User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-GB; rv:1.7.12) Gecko/20050919 Firefox/1.0.7 Build Identifier: 1.5 (20051111) With Windows Explorer set to "Hide file extensions for known file types", when you save an attachment after choosing a different file name, Thunderbird strips the file extension from the attachment. This is confusing and troublesome for non-computer savvy users. This also affects Windows XP. Reproducible: Always Steps to Reproduce: 1. Set Windows Explorer to hide file extensions for known file types (Tools->Folder options->View) 2. Create a new email message 3. Attach a file with a "known" file type, e.g. picture.jpg 4. Save the message and move it to Inbox 5. Open the email, right-click attachment and select Save As... 6. Type a different file name and save Actual Results: File is saved with given file name but file extension (which is not shown in the file Save Attachment dialogue) is stripped. Expected Results: File is saved with given file name using original extension. I would expect if a file extension is given with the name it should be used instead. Other programs use the "Save file as type" drop-down menu with the original file type selected by default.
Not sure if this is a dupe of Core bug 129979, definitely related though. *** This bug has been marked as a duplicate of 298074 ***