There are not any reasons I am aware of
that we would intentionally truncate the body in the iCal.
Can you post the full MIME that you
see in Gmail (There is a drop down next to the reply button where
you can select "show original")? There should be two iCalendar
parts generally (one in the alternative part and one in the attachment
part)... but Id normally expect that they would have the same iCalendar
for the most part, so I'd want to check that first. When you say
the message comes in with the full body, that may or may not be coming
from the iCalendar, as its possible that one of the other MIME alternative
parts is rendering?
Also, is this a one time thing or is
it something you can reproduce?
Nate