Yes on both counts. Flash 9 and .jpg file.  I had Flash 10 but downgraded to 9 to try and fix this problem but still no luck. I uploaded a skin last week and nothing had changed inbetween times. So I'm baffled. I even tried renaming the screenshot, thinking maybe it was the characters in the name. But no go. I still get the same error message.

The one you get when you click on "submit to gallery".  Let me see.... it's https://www.wincustomize.com/upload2.aspx

I tried the old upload link that somebody posted in another thread but it didn't work either.

I wouldn't mind doing that. Anybody want to help out?  I would still need to know what the problem is so I could upload in the future.

Fuzzy is correct,according to Adobe,you must use their uninstaller to remove Flash 10 )   LINK

Okay. Let me be specific as to what I did.

I went to upload the skin and it kept failing. I tried it with two different screenshots and different file names and the same thing happened. So I came here on the forums and read that sometimes Flash 10 can cause problems with uploading. So I went and got the uninstaller, uninstalled Flash 10, restarted my computer, installed Flash 9, restarted the computer and am still having problems, even though it's showing Flash 9 is on my system. It still says the same thing. That the screenshot is invalid and that I have to have a screenshot to upload a skin. I can try another screenshot but I would imagine it  would be the same problem.

Yep. 1152 x 1665

What is the file size of the screenshot...in MB?  Sometimes, if it's too high, WC won't take it.

I think that's way to big.  We're talking about the Screenshot only right?

well, if you take it into ps, you should be able to do a save as and bump down the quality level...dunno.  I know I've had problems with large file-size screeny's before and when I bumped the file size down, they went right in.

Sometimes is just depends on how much detail and such is in the shot.  I've done shots that are the same dimensions but have had issues with the file size.  Glad you got it worked out.

Both. I didn't want to decrease the resolution because it would decrease the quality of the image. It was only 72 PPI as it was. So I had to decrease the size. I tried making the entire image smaller, but that didn't decrease the file size enough. So I had to basically cut it in half. I had two images of an XP desktop and a Vista desktop on the screenshot and so I just took off the Vista image.