Weird flickering effect with HTML/CSS

Just found out that when using in-page popups, using this CSS breaks the page so that it starts flickering/strobing constantly sometimes :D

html {overflow: auto;}

So word of advice: don't use it :) Or use it with some other parameter than "auto".

How to disable the mystical 1px or 2px padding in table / tbody elements in Sharepoint 2010

Ever wonder, why tables get mystically some 1-2px padding around them? And any Developer console(F12) or Firebug won't show you why?
Well here's why. I guess Sharepoint(or Webkit) mystically adds a 1px invisible border around tables. Here is how to disable it with CSS:

table { border-collapse: collapse!important;}