Save images as BMP but not wanting to

My IE has got the nasty habit of SOMETIMES saving particular images as a BMP file. Most of the time on the same pic´s.
I already tried cleaning up my temp. Internet files, clearing cookies, setting my temp. Internet files to max 50 MB etc.
Sometimes when I do not open pic yet, but choose ´save target as´ it saves as JPEG as it should do (but again not always).
You can also hit control C, open Paint, control V and save as JPEG (or via Irfanview etc) but is very time consuming. Who could help to get rid of this problem?

One word: Firefox. Seriously, I never heard this problem before. IE always saved my file as they should be, honestly I don't think it's up to IE to decide whether they are JPEG or BMP, etc. Try reinstalling IE if you want to stick with it.

I actually used to experience this problem with IE as well however I switched to firefox and it was fine. But after the newest IE7 has come out IE works fine now.

Change your cache settings in IE to be 1024 mb. should clear up the problem. Don't forget to close IE and reopen it before trying again.

Thanks all, it worked :)
I got another reply on this as well, solutions could be also found on:
[url]http://support.microsoft.com/kb/810978[/url].
I had to try each different solution before it worked though.