This (the WHS forums) is the place to report bugs now. What you should do is run talq.exe in a command prompt on your client PC and on WHS (you will need to use remote desktop to run it on WHS). Talq.exe will ask you for your Connect ID; if you're not on
Connect, leave it blank. It will give you a CAB number for the client and server, which you should report here along with detailed steps to reproduce the issue.