The crashes I could reproduce in my machine are gone, but I'm not totally confident. I uploaded to https://github.com/douglasdrumond/macvim/releases/tag/snapshot-74 and marked as release candidate. I'll try at work to see if I run into problems too.
2015-03-18 00:08:47.288 MacVim[11180:2170105] Communications error: <OS_xpc_error: <error: 0x7fff71e40b60> { count = 1, contents =
"XPCErrorDescription" => <string: 0x7fff71e40fa8> { length = 22, contents = "Connection interrupted" }
I haven't used 74 long enough to know whether these will go away, but it was these msgs that led me to check for an update.
-P.