diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2cec4fd6b..7574e4815 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 ## Current Master
 
+## 4.6.1 Mon Apr 30 2018
+
+- Fix bug where sending a transaction resulted in an infinite spinner
+- Allow transactions with a 0 gwei gas price
+- Handle encoding errors in ERC20 symbol + digits
+- Fix ShapeShift forms (new + old ui)
+- Fix sourcemaps
+
 ## 4.6.0 Thu Apr 26 2018
 
 - Correctly format currency conversion for locally selected preferred currency.
diff --git a/app/manifest.json b/app/manifest.json
index 3e5eed205..141026d10 100644
--- a/app/manifest.json
+++ b/app/manifest.json
@@ -1,7 +1,7 @@
 {
   "name": "__MSG_appName__",
   "short_name": "__MSG_appName__",
-  "version": "4.6.0",
+  "version": "4.6.1",
   "manifest_version": 2,
   "author": "https://metamask.io",
   "description": "__MSG_appDescription__",
@@ -67,6 +67,7 @@
   "externally_connectable": {
     "matches": [
       "https://metamask.io/*"
-    ]
+    ],
+    "ids": ["*"]
   }
 }
\ No newline at end of file
diff --git a/app/scripts/background.js b/app/scripts/background.js
index 686296329..56e190f97 100644
--- a/app/scripts/background.js
+++ b/app/scripts/background.js
@@ -309,6 +309,7 @@ function setupController (initState, initLangCode) {
   // connect to other contexts
   //
   extension.runtime.onConnect.addListener(connectRemote)
+  extension.runtime.onConnectExternal.addListener(connectExternal)
 
   const metamaskInternalProcessHash = {
     [ENVIRONMENT_TYPE_POPUP]: true,
@@ -335,9 +336,9 @@ function setupController (initState, initLangCode) {
   function connectRemote (remotePort) {
     const processName = remotePort.name
     const isMetaMaskInternalProcess = metamaskInternalProcessHash[processName]
-    const portStream = new PortStream(remotePort)
 
     if (isMetaMaskInternalProcess) {
+      const portStream = new PortStream(remotePort)
       // communication with popup
       controller.isClientOpen = true
       controller.setupTrustedCommunication(portStream, 'MetaMask')
@@ -370,12 +371,17 @@ function setupController (initState, initLangCode) {
         })
       }
     } else {
-      // communication with page
-      const originDomain = urlUtil.parse(remotePort.sender.url).hostname
-      controller.setupUntrustedCommunication(portStream, originDomain)
+      connectExternal(remotePort)
     }
   }
 
+  // communication with page or other extension
+  function connectExternal(remotePort) {
+    const originDomain = urlUtil.parse(remotePort.sender.url).hostname
+    const portStream = new PortStream(remotePort)
+    controller.setupUntrustedCommunication(portStream, originDomain)
+  }
+
   //
   // User Interface setup
   //
diff --git a/app/scripts/controllers/transactions/index.js b/app/scripts/controllers/transactions/index.js
index 541f1db73..aff5db984 100644
--- a/app/scripts/controllers/transactions/index.js
+++ b/app/scripts/controllers/transactions/index.js
@@ -8,6 +8,7 @@ const TxGasUtil = require('./tx-gas-utils')
 const PendingTransactionTracker = require('./pending-tx-tracker')
 const NonceTracker = require('./nonce-tracker')
 const txUtils = require('./lib/util')
+const cleanErrorStack = require('../../lib/cleanErrorStack')
 const log = require('loglevel')
 
 /**
@@ -118,6 +119,7 @@ class TransactionController extends EventEmitter {
   @param txParams {object} - txParams for the transaction
   @param opts {object} - with the key origin to put the origin on the txMeta
   */
+
   async newUnapprovedTransaction (txParams, opts = {}) {
     log.debug(`MetaMaskController newUnapprovedTransaction ${JSON.stringify(txParams)}`)
     const initialTxMeta = await this.addUnapprovedTransaction(txParams)
@@ -130,11 +132,11 @@ class TransactionController extends EventEmitter {
           case 'submitted':
             return resolve(finishedTxMeta.hash)
           case 'rejected':
-            return reject(new Error('MetaMask Tx Signature: User denied transaction signature.'))
+            return reject(cleanErrorStack(new Error('MetaMask Tx Signature: User denied transaction signature.')))
           case 'failed':
-            return reject(new Error(finishedTxMeta.err.message))
+            return reject(cleanErrorStack(new Error(finishedTxMeta.err.message)))
           default:
-            return reject(new Error(`MetaMask Tx Signature: Unknown problem: ${JSON.stringify(finishedTxMeta.txParams)}`))
+            return reject(cleanErrorStack(new Error(`MetaMask Tx Signature: Unknown problem: ${JSON.stringify(finishedTxMeta.txParams)}`)))
         }
       })
     })
diff --git a/app/scripts/controllers/transactions/tx-state-manager.js b/app/scripts/controllers/transactions/tx-state-manager.js
index 00e837571..0aae4774b 100644
--- a/app/scripts/controllers/transactions/tx-state-manager.js
+++ b/app/scripts/controllers/transactions/tx-state-manager.js
@@ -2,6 +2,7 @@ const extend = require('xtend')
 const EventEmitter = require('events')
 const ObservableStore = require('obs-store')
 const ethUtil = require('ethereumjs-util')
+const log = require('loglevel')
 const txStateHistoryHelper = require('./lib/tx-state-history-helper')
 const createId = require('../../lib/random-id')
 const { getFinalStates } = require('./lib/util')
@@ -398,13 +399,19 @@ class TransactionStateManager extends EventEmitter {
   _setTxStatus (txId, status) {
     const txMeta = this.getTx(txId)
     txMeta.status = status
-    this.emit(`${txMeta.id}:${status}`, txId)
-    this.emit(`tx:status-update`, txId, status)
-    if (['submitted', 'rejected', 'failed'].includes(status)) {
-      this.emit(`${txMeta.id}:finished`, txMeta)
-    }
-    this.updateTx(txMeta, `txStateManager: setting status to ${status}`)
-    this.emit('update:badge')
+    setTimeout(() => {
+      try {
+        this.updateTx(txMeta, `txStateManager: setting status to ${status}`)
+        this.emit(`${txMeta.id}:${status}`, txId)
+        this.emit(`tx:status-update`, txId, status)
+        if (['submitted', 'rejected', 'failed'].includes(status)) {
+          this.emit(`${txMeta.id}:finished`, txMeta)
+        }
+        this.emit('update:badge')
+      } catch (error) {
+        log.error(error)
+      }
+    })
   }
 
   /**
diff --git a/app/scripts/lib/cleanErrorStack.js b/app/scripts/lib/cleanErrorStack.js
new file mode 100644
index 000000000..fe1bfb0ce
--- /dev/null
+++ b/app/scripts/lib/cleanErrorStack.js
@@ -0,0 +1,24 @@
+/**
+ * Returns error without stack trace for better UI display
+ * @param {Error} err - error
+ * @returns {Error} Error with clean stack trace.
+ */
+function cleanErrorStack(err){
+  var name = err.name
+  name = (name === undefined) ? 'Error' : String(name)
+
+  var msg = err.message
+  msg = (msg === undefined) ? '' : String(msg)
+
+  if (name === '') {
+    err.stack = err.message
+  } else if (msg === '') {
+    err.stack = err.name
+  } else {
+    err.stack = err.name + ': ' + err.message
+  }
+
+  return err
+}
+
+module.exports = cleanErrorStack
diff --git a/app/scripts/metamask-controller.js b/app/scripts/metamask-controller.js
index 0457b4476..a570f2567 100644
--- a/app/scripts/metamask-controller.js
+++ b/app/scripts/metamask-controller.js
@@ -45,6 +45,7 @@ const BN = require('ethereumjs-util').BN
 const GWEI_BN = new BN('1000000000')
 const percentile = require('percentile')
 const seedPhraseVerifier = require('./lib/seed-phrase-verifier')
+const cleanErrorStack = require('./lib/cleanErrorStack')
 const log = require('loglevel')
 
 module.exports = class MetamaskController extends EventEmitter {
@@ -642,9 +643,9 @@ module.exports = class MetamaskController extends EventEmitter {
         case 'signed':
           return cb(null, data.rawSig)
         case 'rejected':
-          return cb(new Error('MetaMask Message Signature: User denied message signature.'))
+          return cb(cleanErrorStack(new Error('MetaMask Message Signature: User denied message signature.')))
         default:
-          return cb(new Error(`MetaMask Message Signature: Unknown problem: ${JSON.stringify(msgParams)}`))
+          return cb(cleanErrorStack(new Error(`MetaMask Message Signature: Unknown problem: ${JSON.stringify(msgParams)}`)))
       }
     })
   }
@@ -702,7 +703,7 @@ module.exports = class MetamaskController extends EventEmitter {
    */
   newUnsignedPersonalMessage (msgParams, cb) {
     if (!msgParams.from) {
-      return cb(new Error('MetaMask Message Signature: from field is required.'))
+      return cb(cleanErrorStack(new Error('MetaMask Message Signature: from field is required.')))
     }
 
     const msgId = this.personalMessageManager.addUnapprovedMessage(msgParams)
@@ -713,9 +714,9 @@ module.exports = class MetamaskController extends EventEmitter {
         case 'signed':
           return cb(null, data.rawSig)
         case 'rejected':
-          return cb(new Error('MetaMask Message Signature: User denied message signature.'))
+          return cb(cleanErrorStack(new Error('MetaMask Message Signature: User denied message signature.')))
         default:
-          return cb(new Error(`MetaMask Message Signature: Unknown problem: ${JSON.stringify(msgParams)}`))
+          return cb(cleanErrorStack(new Error(`MetaMask Message Signature: Unknown problem: ${JSON.stringify(msgParams)}`)))
       }
     })
   }
@@ -781,9 +782,9 @@ module.exports = class MetamaskController extends EventEmitter {
         case 'signed':
           return cb(null, data.rawSig)
         case 'rejected':
-          return cb(new Error('MetaMask Message Signature: User denied message signature.'))
+          return cb(cleanErrorStack(new Error('MetaMask Message Signature: User denied message signature.')))
         default:
-          return cb(new Error(`MetaMask Message Signature: Unknown problem: ${JSON.stringify(msgParams)}`))
+          return cb(cleanErrorStack(new Error(`MetaMask Message Signature: Unknown problem: ${JSON.stringify(msgParams)}`)))
       }
     })
   }