If you have an overlay that imports a resource module that loads nsILivemarkService it will cause an uncaught exception. Error: uncaught exception: 2147500033 Source File: file:///private/var/folders/Hs/HsyWzDriHMiGEd1BMyFZiU+++TI/-Tmp-/tmp2RtLEw.mozrunner/extensions/pushmarks@mozilla.com/resource/modules/init.js Line: 5 I'm attaching a reduced extension that can reproduce the issue. Clint says: "This not only shouldn't throw an error but that is the wrong error to throw."

Confirmed on Shiretoko as well and on Windows: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1b3pre) Gecko/20090218 Shiretoko/3.1b3pre

In at least one other case (utils.js), the message Error: uncaught exception: 2147500033 is mozilla-speak for "an object did not have the requested interface". (QI fails)

Currently looks like a places issues but could be something more.

Does this help? file:///G:/mozilla/mozilla-central/src/obj-i686-pc-mingw32/dist/bin/components/nsLivemarkService.js:609.0 Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1b4pre) Gecko/20090420 Shiretoko/3.5b4pre Does not make a lot of sense however: deleteLivemarkChildren: function LS_deleteLivemarkChildren(aFolderId) { this._bms.removeFolderChildren(aFolderId); },

See also 499568. Eventually I started getting so may of the errors like that in comment 4 I had to create new profile. That fixed it.

Bug 451915 - move Firefox/Places bugs to Firefox/Bookmarks and History. Remove all bugspam from this move by filtering for the string "places-to-b-and-h". In Thunderbird 3.0b, you do that as follows: Tools | Message Filters Make sure the correct account is selected. Click "New" Conditions: Body contains places-to-b-and-h Change the action to "Delete Message". Select "Manually Run" from the dropdown at the top. Click OK. Select the filter in the list, make sure "Inbox" is selected at the bottom, and click "Run Now". This should delete all the bugspam. You can then delete the filter. Gerv