[MlMt] cursor jumping around when mousing over header fields (from, subject, date)

[Vincent Noel]

Hello,

When I have an email displayed and the header fields "expanded" (using 
the disclosure triangle), if I mouse over those fields (from, subject, 
date, etc) the mouse cursor stutters and jumps around as the fields are 
"linkified". This is annoying and inconvenient when you're trying to 
copy the email address of a sender to the clipboard, as it makes the 
fields a hard target.

Is that a known issue ? (FWIW, I'm on Mountain Lion DP, but I think I 
recall having seen this same issue on Lion)

Cheers,
V.