I had a problem with Lackey where I couldn't connect to any servers without it crashing. I re-downloaded the newest version 2 days ago, and it let me open it, set my name, etc. Since then whenever I launch it, it shows me a blank screen and then says "Lackey Quit Unexpectedly." I am on a MacBook 10.4.11.
You have a crash log?
Talk to me on AIM at Lykos4 if you have some time to help me figure out the issue.