HI,
I should have been clearer.
As I post here almost everyday I tend to have read all the iChat threads and the majority of Messages tagged threads in Mountain Lion.
(I also have read all the Messages Beta Posts but no-one can post to that area any more)
From that I tend to amass enough info on some problems to state what the fix is.
In this case I have seen stalled File Transfers and elsewhere I have picked up the name of the item that shows in Activity Monitor.
I also have not posted it's full name here (sorry for any confusion). You should be looking for URLFileTransferAgent.
As I said in the earlier post it may not actually be visible as it starts and then stops so fast.
When there is a problem it is paused and the Files don't transfer.
7:36 PM Sunday; December 2, 2012
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
iMac 2.5Ghz 5i 2011 (Mountain Lion 10.8.2)
G4/1GhzDual MDD (Leopard 10.5.8)
MacBookPro 2Gb (Snow Leopard 10.6.8)
Mac OS X (10.6.8),
Couple of iPhones and an iPad
"Limit the Logs to the Bits above Binary Images." No, Seriously