The download to disk does not handle long names with spaces. It clips the name at the first space thus loosing the extension.
Do you have an example URL? I have never had this problem.
Almost certain to be either a Tech Evangelism bug (if it's a particular server) or a dup of bug 221028 (if you're doing it yourself). The filename should be suggested with Content-Disposition: attachment; filename="foo bar.baz" with quotes around the filename if it includes spaces, because otherwise it's not possible to tell spaces from non-ASCII characters in internationalized filenames.
Create a .txt file called file with spaces.txt and one called file_with_underscores.txt. Email them to a Yahoo Account. Download them. Extensions are stripped.
Yes, that would be bug 252309 the Tech Evangelism bug for Yahoo Mail. And since this isn't turning into anyone else's TE bug, it's a dup of bug 221028. *** This bug has been marked as a duplicate of 221028 ***
Status: UNCONFIRMED → RESOLVED
Last Resolved: 13 years ago
Resolution: --- → DUPLICATE
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