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During the upgrade of my workstation from RHEL5 to RHEL6 Thunderbird was upgraded from 2.0 to 3.1. I've noticed that the Back button ([) and Forward button (]) don't work as consistently as they did under Thunderbird 2, especially with RSS feeds.

Here's an example failure case:

  • There is an unread RSS item, so I hit Next -> Unread Message (N) to read it
  • I hit Back ([) to jump back to a mailbox message
  • I hit Forward (]) but nothing happens; I am not moved to the RSS message

Previously, under Thunderbird 2, I was able to hit Back over and over, skipping around from mailboxes to RSS feeds to newsgroups, and then hit Forward over and over to get back to where I was.


Update: I looked around in Mozilla's Bugzilla and comment #8 of Bug 533504 ("Back/forward history may contain null values and prevent the history from displaying") seems to describe my problem exactly. In the failure case above, I see the following in the Error Console when I hit the Forward button:

Error: An error occurred executing the cmd_goForward command: [Exception... "Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIRDFService.GetResource]" nsresult: "0x80070057 (NS_ERROR_ILLEGAL_VALUE)" location: "JS frame :: file:///usr/lib64/thunderbird-3.1/modules/MailUtils.js :: MailUtils_getFolderForURI :: line 128" data: no] Source File: chrome://global/content/globalOverlay.js Line: 100

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