Re-sizeable Two Columns – Left Menu CSS

I have modified the BlueRobot layout reservoir 2 column – left menu layout to allow for dynamic resizing.
See my new design here -> Re-sizeable Two Columns – Left Menu
The only real difference is in the CSS, in that this now scales correctly. (Try changing the font size in the browser, Ctrl + “Mouse scroll wheel” should do the trick). All positioning and sizes are now done using em’s as opposed to pixels. This can make the site much more accessible for people who like their fonts a bit bigger.
I have tested this in Firefox IE6 and Mozilla (latest versions) and if someone can test in Opera and others (ie Safari etc) that would be great!
There is every posibility that there are some issues with this, as it is a first hit, and as such may need some tweaking.