Descriptive Problem Summary:
Mouse wheel goes in opposite direction and sometimes only goes in one direction.

Numbered Steps to Reproduce Problem:
Go to webclient version of http://www.byond.com/games/PopLava/BYONDSlideShow
and use the mouse wheel.

Expected Results:
forward wheel increments should zoom in.
backward increments should zoom out.

Actual Results:
Opposite direction or in some cases only one direction.

Does the problem occur:
Every time? Or how often?
In other games?
In other user accounts?
On other computers?

When does the problem NOT occur?