SuperCollider 3.4.2, released March 2011, is a bugfix release.

Mac OSX downloads:

    http://sourceforge.net/projects/supercollider/files/Mac%20OS%20X/3.4.2/
Source code downloads:

    http://sourceforge.net/projects/supercollider/files/Source/3.4.2/

Since SuperCollider 3.4, we’ve found and fixed quite a few bugs –

including an important “garbage collection” problem which could cause

the language to crash in some rare instances, and a cleanup of the

regular-expression methods. We recommend users of 3.4 to upgrade to

3.4.2.

More details on the wiki:

http://supercollider.sourceforge.net/wiki/index.php/SuperCollider_3.4.2

Dan