Sascha - are you running the latest version? Please make sure that you are running 0.5.5.1. I've been using it everyday since the last update without issue. If you are running the latest version of the script, what version of GreaseMonkey are you running? What platform are you on? Feel free to email me at the email above.

Scott - If you don't like your signature at the top - then don't use this script. Please don't spam comments though - don't you have anything better to do? Also, ALL of those programs you mentioned give you an OPTION. Gmail doesn't. This script fixes that.