A new version of DosBox was released today. Lots of fixes to old problems. If you're an old school gamer with a new school box, pick it up.

http://dosbox.sourceforge.net/news.php?show_news=1

Quite a few changes have been made since last version, a few of the more important ones:

4/15/16/32bpp VESA mode support
Lot's of fixes for better vga compatibility
Improved CGA composite output
Added video capturing to avi
Improved screen updating for more speed
PCjr machine mode added
Speedup cpu cores and fix endian issues
FPU core speedup with assembly
Improved keyboard and bios handling
Lockfree mouse mode added again
Improved builtin dos with umbs and better fat support
Added VCPI emulation and fixed some issues with ems
Improved support for booter games
Modem and IPX support improved for multiplayer
Countless other bugfixes and features added