[web007]

I've had something like this bite me before. Back in ~2008 one of the browsers introduced support for a new attribute keyword for some HTML element (Maybe "autocomplete"? I wish I could remember.). Since there wasn't one of those defined before, we expando'd it and used the attribute to hook up our functions. When it started to mean something to the browser, it tried to interpret our attribute and freaked out. It took a while to figure out that it was a new feature, but from then on we prefixed $COMPANYNAME_ for all of our attributes.