The problem with the zoom control is actually a conflict with the theme. When I remove the theme’s ‘style.css’ it works fine. I don’t know exactly which element has the conflict but take a look at anything that applies to tags – I usually just delete them one at a time until I find the conflict.
I don’t have an ETA – every time I give one I completely miss it. Hopefully it’ll be ready “soon” but I’ve still got quite a bit left to code.