Jot Sync Error in 0.3.14

[anaran]

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PROFILE_PATH:

jar:file:///c:/tmp/git.mozilla.org/gecko-dev/firefox-static/tmp/scratch_user/extensions/jid1-HE38Y6vsW9TpHg@jetpack

Sytem: {
"staticArgs": {},
"env": {},
"stdout": {},
"stderr": {},
"platform": "winnt",
"architecture": "x86",
"compiler": "msvc",
"build": "20140904215507",
"id": "{ec8030f7-c20a-464f-9b0e-13a3a9e97384}",
"name": "Firefox",
"version": "35.0a1",
"platformVersion": "35.0a1",
"vendor": "Mozilla"
}

Exception: {
"fileName": "resource://gre/modules/addons/XPIProvider.jsm -> PROFILE_PATH/extensions/jid1-HE38Y6vsW9TpHg@jetpack.xpi!/bootstrap.js -> resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/preferences/service.js",
"lineNumber": 115,
"columnNumber": 0,
"stack": "set@resource://gre/modules/addons/XPIProvider.jsm -> PROFILE_PATH/extensions/jid1-HE38Y6vsW9TpHg@jetpack.xpi!/bootstrap.js -> resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/preferences/service.js:115:1\nBranch/<.set@resource://gre/modules/addons/XPIProvider.jsm -> PROFILE_PATH/extensions/jid1-HE38Y6vsW9TpHg@jetpack.xpi!/bootstrap.js -> resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/preferences/service.js:36:7\n@resource://gre/modules/addons/XPIProvider.jsm -> PROFILE_PATH/extensions/jid1-HE38Y6vsW9TpHg@jetpack.xpi!/bootstrap.js -> resource://gre/modules/commonjs/toolkit/loader.js -> resource://jid1-he38y6vsw9tphg-at-jetpack/jot/lib/main.js:176:33\nemit@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:96:9\nonChange@resource://gre/modules/addons/XPIProvider.jsm -> PROFILE_PATH/extensions/jid1-HE38Y6vsW9TpHg@jetpack.xpi!/bootstrap.js -> resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/preferences/event-target.js:49:5\nPreferences.prototype._set@resource://gre/modules/Preferences.jsm:119:11\nPreferences.prototype.set@resource://gre/modules/Preferences.jsm:105:5\nPrefStore__setAllPrefs@resource://services-sync/engines/prefs.js:126:9\nPrefStore_update@resource://services-sync/engines/prefs.js:183:5\nStore.prototype.applyIncoming@resource://services-sync/engines.js:331:7\nStore.prototype.applyIncomingBatch@resource://services-sync/engines.js:297:9\ndoApplyBatch@resource://services-sync/engines.js:951:32\nSyncEngine.prototype._processIncoming/newitems.recordHandler@resource://services-sync/engines.js:1062:9\nCollection.prototype.recordHandler/this._onProgress@resource://services-sync/record.js:625:9\nChannel_onDataAvail@resource://services-sync/resource.js:543:7\nwaitForSyncCallback@resource://services-common/async.js:102:7\nRes__request@resource://services-sync/resource.js:390:14\nRes_get@resource://services-sync/resource.js:414:12\nSyncEngine.prototype._processIncoming@resource://services-sync/engines.js:1069:18\nSyncEngine.prototype._sync@resource://services-sync/engines.js:1481:7\nWrappedNotify@resource://services-sync/util.js:148:21\nEngine.prototype.sync@resource://services-sync/engines.js:655:5\n_syncEngine@resource://services-sync/stages/enginesync.js:199:7\nsync@resource://services-sync/stages/enginesync.js:149:15\nonNotify@resource://services-sync/service.js:1275:7\nWrappedNotify@resource://services-sync/util.js:148:21\nWrappedLock@resource://services-sync/util.js:103:16\n_lockedSync@resource://services-sync/service.js:1265:12\nsync/<@resource://services-sync/service.js:1257:14\nWrappedCatch@resource://services-sync/util.js:77:16\nsync@resource://services-sync/service.js:1245:5\n",
"message": "can't set pref extensions.jid1-HE38Y6vsW9TpHg@jetpack.syncstorage to value 'undefined'; it isn't a string, integer, or boolean"
}