Updates in version 4.2:

Added a screen saver! Press from any of the menus to activate it.
Applied some optimizations to greatly increase the speed of the emulator engine. This means Nostalgia will run at full speed on more computers.
Added Kaillera network support! Run from the command line with the -k switch, or run from inside Nostalgia.
Fixed a GLARING bug in initial multiplayer implementation.
Fixed some bugs in Joystick implementation.
Added the ability to customize other keys, like screenshot, sound enable, etc. Edit controls.cfg to change them. Valid values are found in controls.txt.
Fixed the "Ice Trek" bug that prevented you from getting to the last screen.
Updated Ice Trek bug fix with Joe Z´s new info. Thanks, Joe!
Fixed a series of bugs with the display of moving objects.
Small updates to sound emulation for accuracy
Fixed a bug in the way controls.cfg was saved. Thanks to Rick for finding this one.