No Wrong MimeType is a Thunderbird extension that avoids the wrong mimetype entries for DOC, PDF and RTF attachments. This error causes the inline view of these attachments both by sender and by recipients.
If you have alredy this problem, to fix it you must also delete the mimeTypes.rdf file in your profile's directory. To know more about it see bug n°353815.
· Thunderbird 1.5 - 2.0.0.*
How to Install in Thunderbird;
1. Right-click the link below and choose "Save Link As..." to download and save the file to your hard disk.
2. In Mozilla Thunderbird, open Add-ons from the Tools menu.
3. Click the Install button, and locate/select the file you downloaded and click "OK".