Just as an update to this...I still can't get this to work on 1 specific PC (Windows 7, 64 bit with IE 11), but it works fine on other similar systems. I reset all of my IE settings on this PC and nothing works. I used the downgrade link in the other thread for v4.5.5.1 and now it works fine. It seems that this specific PC's installation of IE is not decompressing the compressed pages that BI is serving. I have gone to the extent of running Wireshark on my BI PC and examining the HTTP data, comparing the PC I am having trouble with and another PC that works fine. The data BI is serving out appears to be identical (albeit compressed and not clear text like usual HTML code) to both PC's so that leads me to believe there is an issue with my PC and not BI.
Other browsers on this PC work fine, just IE is displaying this problem. I like using IE because of the smoothness of the ActiveX control.
I have no idea why Internet Explorer on this PC would not be decompressing pages coming from BI...more investigation is needed.