>There have been other issues, then. Starting at about 9:30 it was intermittent. For more than one day last week, there would be small periods of time where the page wouldn't load, and a dialog would finally appear saying that UT is unavailable.

Then, it is as mentioned in the other reply, a combination of other external factors as well.

>At this moment, clicking on 'Obtain the list of messages for other forums' folder does not respond, or returns a small subset of what has been posted today (last attempt it showed one message being posted in the Chatter forum)

Our log shows that each request is processed as is. This has been the case since we have rebooted the server. For the no respond, the cause is external. For the small subset, the cause is because the traffic has been lowed in regards to all that.