two small possible bugs

[gleyepost]

1. until i loaded the new GA version of 6, i only saw the MOTD once; now it seems to keep coming back every time I start the program.
2. i seem to be able to crash the program by clicking to close group tabs too quickly...though it has only happened a couple of times so far, and i don't think I can recreate it at will...

I am running 6.4.2 build 2146, on a Windows 7 64-bit quad-core Dell with 4GB memory.