Confirming that this removes the Cocoa problem reported in #571.

Also ran the full test suite and everything looks clean, no spurious images left outside the test directory.

Thanks for the quick response!

ps - on my system, merging this on top of current master I get:

Ran 1046 tests in 601.790s

FAILED (errors=21, failures=248)
ICE default IO error handler doing an exit(), pid = 18143, errno = 32

but I don't know if you make it a point of keeping master in passing condition...

I'm only getting 2 failures on master at the moment. Can you file a new issue with the output from nose?

OK, I'll repeat the tests once more to make sure it wasn't a glitch in my system, and will file a ticket with all the nose output if I see similar results.

Done, #612. I did a fully clean build, nuking everything before installing, and now it's much better. Still 22 errors and 10 failures, but not hundreds.