Possibly one or two bugs in Firefox v4.01
When attempting to forward multiple non-consecutive E-mails by holding the CTRL key down and left-clicking the E-mails to forward, the receiver sometimes receives garbled text instead of multiple E-mails.
I's never happened with multiple consecutive blocked E-mail forwarding (block select [using SHIFT key] the first and last E-mail to forward with all in between selected) and has only shown up corrupted twice out of about 20 attempts to send multiple non-consecutive E-mails.
Second bug is similar to above.
After forwarding multiple consecutive E-mails, all are marked with an icon as having been forwarded, but for multiple non-consecutive E-mails, some get marked with an icon and others don't!
I use WinXP SP3 + all later patches.