Whilst playing around with the GUI2 I ran into the following issue:
Changing the language does not work. It seems the download/extraction fails due to the following invalid option:
tar: short read
wget: short write
Connecting to downloads.digium.com (76.164.171.227:80)
gzip: invalid option -- d
BusyBox v1.10.3 (2008-12-03 09:27:03 EST) multi-call binary
Usage: gzip [OPTION]... [FILE]...