I just uploaded a new version, RP2pr2b. This is basically just prerelease 2 with a bunch of bug fixes, so no new content.
The following bugs are fixed:
Duplication bug with filter on a chest with single items.
Losing the item inside a filter when broken.
Panel placement failing.
Multiple tube placement eats tubes.
TileTube is missing a mapping on server.
Diamonds get renamed to emeralds (you will have to delete redpower.lang from your config directory for this to be fixed).
Breaking rubber saplings creates items that crash.
Hollow covers and tubes.
Missed a texture case with custom-textured jacketed.
Bundle colors are getting mixed up.
Shears on rubber leaves drop the wrong block.