Trying to post a large (3.4meg) image in my thread:

As described in my post, the upload manager crunches away for a minute or two, and then goes blank white (and hangs?)... This happens across multiple attempts.

Any words of wisdom? Has anyone else encountered this problem? Is there a fix to it? I'm wary of shrinking the file, as it is a very large map, and a good deal of the detail will be lost.