User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1) Build Identifier: version 0.8 (20040913) We've got here messages with PDF attachments. The MIME Content-Type field marks the PDFs as application/octet-stream instead of application/pdf (these messages are machine generated). But the attachments DO have a PDF extension. Thunderbird ignores the extension, and (partly) treats the file as of unknown type: 1. It is not possible to save the default (double-click) action for those file (I want to always open them with acrobat reader). 2. They have no acrobat icon. 3. Here comes the "partly" type - because Windows uses extensions for managing associations, the default open application is correct - acrobat reader. But the "do this automatically.." checkbox is disabled. Reproducible: Always Steps to Reproduce: 1. 2. 3.
Just wanted to add, that after using the "do this automatically.." checkbox for an attachment that was marked correctly, it is now the default action.
Note that duplicate has been resolved WontFix -- this change will not be made. *** This bug has been marked as a duplicate of 108186 ***