MSN Connectivity Problems

For the past couple of days (or so), my MSN IM connection has been flaky – disconnecting every couple of minutes. This is the case with either the latest version of Trillian or the latest version of the MSN Instant Messenger client. I've got a Linksys BEFW11S4 v2 (with the latest 1.45.10 firmware installed). Anybody else running into a similar headache?