Sorry Jam, this part was about your site:
>>>As far as I remember ( can't check since your site is not opening right
now) you site has a lot of custom javascript boxes with ads and etc.
Chances that one of them is conflicting with Mailbox and Instant
Notificaitons plugins are very high.
Notificaitons are not working even after the Attracta code was disabled? (
http://www.oxwall.org/forum/topic/7457)