URL Text links disappear from Thumbnail view only

[whats_up_skip]

I don't think I have done anything to my gallery to change style or layout in recent times, yet suddenly the Url Text => Url Text have disappeared from the Thumbnail view. The links still appear in the "Album list view" and the "Image view". The "description" text still appears correctly in the user or admin mode, just without the link working. When the details are viewed in the "edit files" section in admin mode, the code looks correct.

I have looked at my gallery on two computers, one with Windows Vista and the other with Firefox running on Linux and the problem appears on both. I have done a search in the forum, but I could not find anything about it.

My gallery is at http://www.japaneselifestyle.com.au/japan_picture/index.php