SBCG4AP Map Bug?

edited June 2010 in Game Support
Dear Telltale et al,

I've finally got around to playing my copy of the SBCG4AP and have really been enjoying the episodes thus far. However, there's been a persistent bug that's been popping up on my system:
When I open the map and cycle between map/collectibles/achievements (aka Awesomeness!), the achievements screen more often than not fails to load and is overlaid with the current contents of either the map screen or the collectibles screen. While those doesn't affect gameplay directly, it has consistently popped up in every episode I've played so far.
I've tried fiddling with resolutions, fullscreen/windowed and rebooting both game and computer, and only rarely does the Awesomeness! screen work properly.

OS: WinXP
3.0 GHz single-core processor
128 MB ATi-compatible video card
1.0 GB RAM

A screenshot is attached, with the mouseover showing that the screen in question is actually the Awesomeness! screen, with the collectibles being the previous screen.

Thanks in advance.

Addendum: Using game downloaded from Telltale, not the Steam version
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