Originally Posted by dkf747
Since this problem exists for others not on a BES, it's possible the problem is something else. Last time I brought this up, no one had an answer.
I have noticed a friend from Cingular having the similar issue. He told me he did not set himself to "unavailable". Somehow, after I send him few messages during the normal office hours (9-5pm), he "becomes" unavailable from my BB Messenger.