I thought i saw a post related to this one a while back but for some reason any search i perform on wordpress.org turns up no results.
I have an occasional problem where when i try to upload an image, inline-uploading.php wants to download when i click "upload", and a thumbnail doesn't get created - this file, if i actually download it, is blank. Same thing occurs on occasion with post.php. - at the moment, both are trying to download.
The strange thing is the file does get uploaded, and the post does get saved, but they do not continue on to the next page as normal, and like i said with the image upload, no thumbnail is created.
I have tried disabling plugins, and since this problem isn't always present, i'm not sure what to suspect. Do file permissions affect this? server issue? or wordpress?