Every Page I open in RCUniverse has the following Java Script Error:

Java Script Error

Description :Object doesn't support this action
Source :http ://www.rcuniverse.com/forum/forumid_239/tt.htm
Line :766


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Its always line 766 but of course the html reference changes for each page.
Any ideas?

Also I see no way to upload an Avatar in my settings. Under the heading "My Avatar" are two options. The first is selected with no text behind the button (which looks greyed out). The second option is "Don't display avatar" and if I select this option I can no longer select the first (default) button. I see no option to upload an avatar although the FAQ and fact that most ppl have one displayed certainly implies I am missing something here.
hope you can help.