Hi Tom
I just stumbled upon the exact same issue today where the entire SharePoint site was working perfectly yesterday without this kind of error. The same error occurred to firefox at the same time. You cannot submit any form (out of box ListForm is OK). Also I noticed there is JavaScript error icon shown at the bottom corner of the IE browser points to missing function call. After I put IE developer tool on with JavaScript tab on, I search the specific JS function call error to see if the WADataView.js or WAListForm.js is loading properly and it was not.
The fix seems to be simple and worked for me. I went to Central Admin pages and retract then deploy Quest Web Parts solution package. Recheck all the pages and everything starts to work again.
I hope this helps you as well.