From the page Snorre pointed to:"Linux users report that updating Sqlite and then removing all places.sqlite* files resolves the issue", an then points to two links that may be of interest:
http://forums.mozillazine.org/viewtopic.php?f=38&t=703815&start=15 and http://support.mozilla.com/tiki-view_forum_thread.php?&comments_parentId=181252&forumId=1 OleA Snorre Jensen skrev:
On 15. jan. 2010 10:48, Ole-Anders Andreassen wrote:I have several problems with Iceweasel running under Lenny.After a dirty shutdown of the client, it is not possible to run Iceweasel before the file .parenlock is removed.History stops working Navigation buttons stops working.This happens when places.sqlite is locked or damagedhttp://kb.mozillazine.org/Unable_to_delete_or_edit_certain_bookmarks_-_FirefoxI have to remove .mozilla to get things working again. OleA