finlay: It turns out this happens on Windows as well, so it's probably something Simon should look at.

And about the Mac version's progress, it now uses 2012-01-07's codebase http://www.lemmingsforums.com/Smileys/lemmings/smiley.gif" alt=":)" title="Smiley" class="smiley" />
About the long delay - I didn't have a proper way to integrate changes from Simon's repository and that kept me off it for a while. But I talked with him on IRC today and we decided on a hopefully better solution.