I use to see the icon preview with leopard snow, now that i installed Lion i can't see them, Why is this?

The funny thing is that today i discovered that a complete album i do can see the icon preview albumart but just that one, the rest of my music i just cant

That wasn't a change in Firefox. It sounds like something is broken in your Firefox installation, or you are misunderstanding the different between the Bookmarks Toolbar and the other Toolbars.
In the Bookmarks Toolbar the text appears next to the website icon, not below the icon as with the other two Toolbars, and it's not switchable between text and no text as with the other Toolbars. With both the bookmark icon and the Bookmark name missing, something is broken in your installation. You need to do a little troubleshooting.
Do you have that problem when running in the Firefox SafeMode? <br />
[http://support.mozilla.com/en-US/kb/Safe+Mode] <br />
''Don't select anything right now, just use "Continue in SafeMode."''
If not, see this: <br />
[http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+themes]
If your problem isn't related to an extension, your bookmarks data base file (places.sqlite) is probably corrupt. <br />
http://kb.mozillazine.org/Locked_or_damaged_places.sqlite <br />
Be aware that if you delete the "places.sqlite" and similar files, your bookmark website icons won't automatically appear (the JSON backups don't have that icon data) when you restart Firefox and the places.sqlite is rebuilt using the backup data file, but the icons should be saved the first time each bookmark is used for the first time.

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