ToUrl method not working after Upgrade

Out of curiousity, I know you said you tried the trial of TC at home (which I'm assuming would be the TC 8.50 trial version).  What version of TC are you experiencing the problem with?  The reason I ask is that, depending upon the version of TC, browser support may be different.  For example, TC 7.20 is when support for Firefox 3.5 was added.   Firefox 4 and IE 9 had not been added until TC 8.50.  IE 8 was added with TC 7.0.  Additionally, different .NET platforms are supported with different versions with TC 8.50 actually deprecating support for certain older platforms.