User Agent: Mozilla/5.0 (Windows NT 5.1; rv:7.0.1) Gecko/20110928 Firefox/7.0.1 SeaMonkey/2.4.1 Build ID: 20110928161145 Steps to reproduce: I'm using 2 versions of Seamonkey on the same profile in a dual-boot configuration. One is up-to-date (windows), the other a pretty outdated 2.0.11 (Ubuntu (Lucid), when will they ever update their Seamonkey package??). This worked fine up until the bookmark scheme changed (Seamonkey 2.4), now the bookmarks of Seamonkey 2.4 are lost every time I use Ubuntu. But I could always restore the bookmarks using the bookmark backups Seamonkey creates automatically (nice feature!), until today. I know this causes problems with the bookmarks (and many other settings) but I could work with it. The other option is to manually install a Seamonkey 2.4 in Ubuntu, instead of using the once Canonical provides, that breaks updates, but hey, they don't update their package anyway. Actual results: Today again I have no bookmarks (on windows, Seamonkey 2.4), but every bookmark backup I try to restore, results in a "Unable to process the backup file." warning. Even backups that did work in the past. (I expect/hope the problem is not in the backups themselves.) Also importing bookmarks from the bookmark.html files doesn't do anything (no warning, just nothing) and creating new bookmarks or bookmark folders also does nothing. The difference with other times I lost all bookmarks, might be that I accidentally started with creating a bookmark. It didn't get created, at least not that I can see. It seems like something is very broken that prevents any bookmarks to be created/restored/imported. Expected results: It should still be possible to start over, an empty list should be the worst case, not no bookmark functionality at all. The bookmark restore could give a better error, instead of a generic warning (should be an error) without any details on why it didn't work. The bookmark import does not at all seem to notice the import failed.
So you were doing an Import from your (2.0) bookmarks.html rather then any type of Restore from /bookmarkbackups/ (bookmarks*.json). If you do not need anything stored in places.sqlite (there is more then just bookmarks), you could (after exiting SeaMonkey) delete places.sqlite, restart & try the Import again. (And of course, backup first.) OK so you were attempting a Restore too. A corrupted bookmarks.json file generates the error, "Unable to process the backup file". (Edit the .json file with a text editor, deleting the first two bytes, should be sufficient to generate the error message on demand :-) .) Review: http://kb.mozillazine.org/Unable_to_process_the_backup_file_-_Firefox
It's looks like you profile is broken for some reasons, can you recheck this on clean profile - http://kb.mozillazine.org/Profile_Manager#Creating_a_new_profile ?
Resolved per whiteboard