Does any of having problems in changing their primary picture??? For some reason I can't change my primary picture.

Any ideas why is that happening?

You must be making a simple error Nightmare.

Usually the change cannot be seen until the browser cache is refreshed (F5).

I am pretty sure I'm not making a simple error here. I even make sure that the picture is 100 x 100.

The F5 idea still didn't work but thanks to the suggestion artfizz. Anway I've already to manage change it. Currently I always use Google Chrome as a web browser and that's where I can't change my picture but then when I try to use Internet Explorer I manage to do the changes.  So obviously the problem has got something with the web browser because at the first I know wasn't making any mistakes as the picture that I was trying to use is 100 by 100 as I resize first befor trying to make any changes.

Why don't you delete it and wait a few days - or, maybe you're having a nightmare!

There is a known problem with Google Chrome that sometimes google-chrome-refusing-to-insert-pictures into a forum post (and the same with Firefox). However, in that case, the problem manifests itself as a Missing Page error.

I had problems recently with my primary picture apparently not being updated. Google Chrome, Firefox and IE were showing me different pictures. That was an issue with cache refresh.

Don't worry guys I've already fixed the problem few days ago. Thanks anyway