I subscribed to this thread:

In the email that came from the forum, parens were automatically added around the Youtube links. The email program on my Pre tried to make the links clickable, but the closing parens ")" were appended onto the links:
(http://www.youtube.com/watch?v=LMi6JQM1HpA)<--Parens is in the link
Instead of like this:
(Those are not active links. They are just colored text to illustrate the problem.)

There are ways to get around the problem. BUT If the parens around links were eliminated, or spaces were added between the parens and the link code, they'd be clickable directly from the email.