User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; be-BY; rv:1.8.0.4) Gecko/20060508 Firefox/1.5.0.4 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; be-BY; rv:1.8.0.4) Gecko/20060508 Firefox/1.5.0.4 I moved profile directory on the flash disk(for share thunderbird data between work and home computers). When I run thunderbird WITH flash disk, it works perfect. When I run thunderbird WITHOUT flash disk(i.e. profile directory can't be found), thunderbird reports : "Thunderbird is already running, but is not responding. To open a new window, you must first close the existing Thunderbird process, or restart your system.". It happen in thunderbird 1.5 Reproducible: Always Steps to Reproduce: 1. Remove profile directory(but leave it in profile.ini), or change Path in the profile.ini into non-exists directory 2. Run thunderbird Expected Results: Seems to thunderbird should report other message.

*** This bug has been marked as a duplicate of 278860 ***