Zoom function

The zoom feature seems to have gone nuts since this morning's outage.
The game still starts zoomed out (another bug that hasn't been addressed), and now just the slightest touch of the mouse wheel and the zoom goes crazy, with the game zooming in and out rapidly and unable to stop this without refreshing the browser.
Just tried using the camera controls in the cog menu, and at least that works, but the normal method just gives the game a fit.

Update: it also goes mad if you use the wheel in a menu, like scrolling down the achievements. The menu locks up, then bounces up and down, and the island map starts zooming in and out again.