firefox 3.5.x bookmarks

[smoczyna]

I have read a lot about the problems with bookmarks but in my case nothing helps, even xmarks. When trying to synchronize my bookmarks it is working but unsuccessfully, nothing happens even after an hour.
What can be the reason ? Nothing seems to be working, backup files cannot be processed, adding , changing or deleting anything don't work as well.

[ElSlunko]

That sounds very odd. Have you been having this issue for a long time or did it just start recently? Do you have a very large amount of bookmarks? Seems like something is corrupting them.