Check to make sure your upload folder has proper permissions.
You can also turn on Debugging to see if you get an actual error message returned.
I’m having the same problem and that master list thread does not help.
Try turning on Debugging or error reporting to see if there is an error – if we have an error we can do a fix. 🙂
I have this problem too .
Hey I know the question THAT Ganna ask is too rookie but
How can I turn on debugging mode or error reporting and where can I access to it’s logs !??!
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and by the way . I solved this problem by reuploading WP 3.5 & replace its files with older WP 3.5 File . but this solution is temporary . my problem keep coming back in less than 6-7 hours ! (just Mentioned!may be it helps )
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I think this version of WP have Serious problem AND I HOPE developers see this forum .
many users in other languages have this problem too and they search for a Solution .
The issue still exists even though I tried re-installing WP 3.5! Darn, if only I can bring back the old version that I used.
I am hoping that this issue would be fixed ASAP or release a new version of WP!
@ travelersconfessions
Me too ! I just hope that the next version of WP fix this dam problem .