VirtualDub 1.6( www.virtualdub.org ) allows you to
+ select YUV formats for en/decompression,
+ contains preliminary DirectX9 display driver support as well as OpenGL support,
+ frame seeking is now incremental which should prevent the application from hanging when preloading clips with long keyframe distances,
+ the new position slider displays frame number markers and supports mouse wheel scrolling,
+ JPEG image sequence input/output is now supported,
+ a DV video decoder has been integrated, audio in DV type-1 files can now be decoded,
+ there's a native AMD64 build
and last but not least a bunch of bugs have been ironed out as well.
The author considers this new release as experimental, so you may want to keep the old version just in case.