User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; nl; rv:1.9.2) Gecko/20100115 Firefox/3.6 GTB6 Build Identifier: 18.104.22.168 (20090812) and 3.0 After (accidently) moving my profiles folder (wrong path in profiles.ini)Thunderbird said: There is an instance Thunderbird acive, please shut down or reboot. (In fact it was in Dutch so in English it might be a bit different) Reproducible: Always Steps to Reproduce: 1. wrong profile path in profiles.ini 2. 3. Actual Results: Errormessage: here is an instance Thunderbird acive, please shut down or reboot. Expected Results: Errormassage: "Wrong profile path" or something similar It took some time before it was clear that the message was wrong.