I'd like to thank those who posted possible workarounds.
I finally logged in after being excluded all morning ("the server is experiencing network connectivity errors).
What may have helped was wiping out web data and/or restarting the browser (IE 8) - multiple times.
The offending midtier was taken out of the pool a few days ago and parts of the infrastructure were rebuilt to correct the problem. It is back in now and from what was tested, this error has not been seen.
If you do see the error, please report it