Receive an invitation using GitBash on Windows 7

I downloaded and installed Git for windows from this Google code page and followed this excellent tutorial for installing Git on my Windows 7 computer. I also correctly installed my SSH keys and linked them to my Github account. I can successfully clone repositories using Gitbash, which checks if my keys are configured correctly. However, when I start Git Bash in the Start menu, I get a blinking cursor and don’t see a hint.

Thanks in advance for your help.

PS The first question ever about stackoverflow :) Sorry for any errors.