Segmentation Violation caused by indexing past the end of a subsector plane's light links array when dynamic lights were disabled.
Audio
The Mus and Ext interfaces can be loaded seperately out of a ds plugin.
As a fallback, if dsSDLMixer is not available, use the Win32 Mus interface.
The -ds9 command line option reverts back to the DirectSound plugin (with 3D sound support and EAX effects), but MP3/OGG/etc. music playback won't be available in that case.
Networking
Under certain circumstances, Doomsday failed to understand the master server HTTP responses. This was fixed by using an external library (libcurl) for doing the HTTP transfer.