User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.5) Gecko/20091102 (CK-IBM) Firefox/3.5.5 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.5) Gecko/20091112 Thunderbird/3.0 I have created a new RSS Account and following directory has been created: C:\Documents and Settings\Administrator\Application Data\Thunderbird\Profiles\zsgyfpe7.default\Mail\Feeds with some stuff inside like Trash and Trash.msf files, etc... After some work with that account, I decided to remove all subscriptions and delete the account, but C:\Documents and Settings\Administrator\Application Data\Thunderbird\Profiles\zsgyfpe7.default\Mail\Feeds remains with some more files. I created again a RSS Account with the same name than before but this time a new directory is created with the same stuff inside: C:\Documents and Settings\Administrator\Application Data\Thunderbird\Profiles\zsgyfpe7.default\Mail\Feeds-1 The first directory seems to be useless anymore but will remains there infinite. My understanding is that remove account action should delete such directory too, shouldn't it? Is it safe to remove it manually? Reproducible: Always