After the delay of Yo Frankie a new bug fix version of 2.48 (2.48a) has been released.
“A couple of important bugfixes has been done in Blender since the release, especially for using the Game Engine and GLSL.”
Theres a nice long list of bug fixes which you can read about here.
And of course Blender 2.48a can be downloaded from the Get Blender page on blender.org.
