Kyle,
What operating system are you running IE8 on ??
I've upgraded my laptop to Windows 7 32 bit, which runs IE8 natively, and I have no issues at all with working in the Connect forums. I experienced some issues with IE8 and Yahoo webmail during the Win 7 beta and RC releases, but that's all sorted now too.
If you upgraded an existing machine from IE6 or IE7, then perhaps some of your issues are caused by existing browser "Add-ins" that are not fully IE8 compatible. Have you tried disabling existing add-ins and also making sure that your installs of Flash and Shockwave are right up to date?