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Unable to edit thumbnail in 2.1

I am getting this warning -
Failed to move uploaded file to target destination
Is it related to permissions or some generic bug in 2.1? Anyone else having same problem?
0
Comments
Yes, it has been described before. The last several people I told them to report it on github - they may have an they may not have. But if you can search the forum to corroborate,
http://vanillaforums.org/discussion/comment/172012/#Comment_172012
and several more. Another one reported it later,
I may not provide the completed solution you might desire, but I do try to provide honest suggestions to help you solve your issue.
I have reported it on github, my github handle is underdogg, probably open issue
Interestingly another comment fixes the issue.
if (!move_uploaded_file($Source, $Target))
toif (!copy($Source, $Target))
The file is already present on the server, we're not trying to move an uploaded file, we're just copying the one that exists.
@UnderDog, please update the github issue with the solution
Can't, but go right ahead :-)