Version: (using KDE KDE 3.3.0) Installed from: SuSE RPMs When an e-mail that contains no timestamp is forwarded, the quoted e-mail's timestamp is January 1, 1970, 00:00. It would be more appropriate to clearly say "unknown" or to not forward the timestamp line at all.
I tried reproducing this by editing one of the messages in my maildir to contain no date. Forwarding it (inline and attached) didn't add a date, so I guess no date is added in that case. This bug is no longer reproducible on trunk r881868.
Closing as workesforme since this seems to have disapered somewhere along the line