I periodically get browser errors across all platforms, these errors are inconsistent and go away with a page reload. Then again, if you keep reloading the page you eventually will get the same error or a similar error.
Cause seems to be script tags being loaded out of sequence. This can be fixed by judicious use of the defer="defer" script attribute.
Also, Internet Explorer does not like the fact that the wordpress https:// pages are trying to fetch the urchin script from google-analytics.com via a http:// connection. The user is presented with an "insecure action blocked" message, and the page fubars.