the first screeny was on Opera 9.25.
Tested it on IE7 (see picture below) and Firefox 2.x without a change.
Noticed that failure alrdy months ago, but didn't see the need to inform you guys about that, because the other attachements could be deleted normally.
Now i realised that it's not only the old ones, even some newer attachments can't be deleted anymore (see the picture below)
My system (+browsers ofc) are patched and have all available updates.
Tbh i can live with undeleteable pictures, but dont want that the forum-database has some issues / problems.
edit:
Maybe that's from interest: I can access all those pics and they are still displayed in threads.
Have/had that failure on different machines (at work, on my desktop, on my laptop), so i doubt that it's a local problem, more like an account-/forumproblem.