I’m perfectly sure, I’ve thought of all that, and done it 😉
The only plugin that seems to be giving errors is the Profile Pic plugin, which is a shame, since it’s a very useful plugin.
The two validator links I’ve used are:
Xhtml
CSS Validator
With the CSS Validator I’ve validated by address, and I’ve also validated by direct input.
Ok, fair enough, I’ll hold my hands up and say I’m a bit of a geek! Maybe I should just ignore this then, which is a shame, since I always make sure all websites I code are W3C valid.