I've spent the past few weeks tidying up the coding across the entire main site, so if you notice anything not working properly, please mention it here ASAP.
I've also made (nearly) the entire site HTML standards compliant, which, in the very least, will minimize any browser compatibility issues.
And finally, I've also updated the entire site's URLs to use mod_rewrite, which essentially means they all look a lot cleaner.
Of course not. He has minimized compatibility issues by doing this, he does not make all the issues even worse :/ That would also be a pretty stupid thing, actually.