I'm glad to see I'm not the only one trying to do this and encountering this issue.
Unfortunately, your solution didn't work for me. I was able to install the older port okay, and `port installed` shows that I have in fact installed screen 4.0.3_1, and `which screen` shows that I'm running the binary that I expect to be running, but still I get "mate: failed to establish connection with TextMate."
Any ideas?
Thanks in advance, Brian