I burned one yesterday -- Princo DVD -R) -- burned @ 4x, plays in both players we have here (2yo Wintel WIN9663x and almost new Sharp DV-NC70X DVD/VCR combo.)
Same title burned to Verbatim DVD-RW (tried both DVD + & - RW) will only play in the Sharp, the Wintel bombs on it.
Title - Disney's Fantasia 2000 - the only protected DVD I have in the house, hence it gets experimented with.
Made the copy with Clone-DVD direct from the original disc.
Before you say "that's impossible", try this: Insert a copy made with DVD-Decrypter (one of the DVD-RW's I've been playing with) in the reader.
Start Clone-DVD & wait until the disc is recognised, but stay on the first screen.
Remove the disc and replace with the protected one.
Complete the Clone-DVD routine.
Probably worked because I didn't really need the copy anyway:D
It's a movie you'd only watch once.
PS: Installed the 1.0c firmware -- no problems.