I have the same problem.
I am using Ubuntu 12.04 and Gimp 2.6.12
A new GIMP image can be save under a given name with "save as". When I try to save an already named file under a new name with "save as", GIMP crashes. The file is saved under the new name before crash, and can be opened again and can be edited.
If I use "save as", but do not change the name, no crash occurs.
This bug is also regsitrated as https:/ /bugs.launchpad .net/ubuntu/ +source/ gimp/+bug/ 1048657
It is not solved there.
I have the same problem.
I am using Ubuntu 12.04 and Gimp 2.6.12
A new GIMP image can be save under a given name with "save as". When I try to save an already named file under a new name with "save as", GIMP crashes. The file is saved under the new name before crash, and can be opened again and can be edited.
If I use "save as", but do not change the name, no crash occurs.