I had an issue today using the scrollTo JQuery library with html5. Everything worked perfectly on Firefox, Safari and Chrome, but wouldn't work at all on Internet Explorer (7 and 8). IE reported this error message:
"Object doesn't support this property or method"
After spending far too much time, I finally figured out the html5.js I was using to give support for html5 in IE was causing the conflict. Moving this to load after the JQuery and scrollTo libraries resolved the problems and I'm happy to report I'm back in business with scrollTo and html5 on IE. If you have the same problem, hopefully this will save you some time troubleshooting it.