This is nothing to do with the recent update.
I use Gnu screen a fair bit to avoid having terminals open all over my screen. I have found that from within a screen session, if I type ``mate some_file.txt'' TextMate gets launched (if not already running) or brought to focus with a new window, but the file is not opened and the command failes with ``mate: failed to establish a connection with TextMate.''
The initial call to TM is working because TM activated. Any ideas how to make the next step work?