Apparently, on the Pirates discs, "the BD-Java features ("Liar's Dice" and "Scoundrels of the Sea") require new firmware updates on many existing models of Blu-ray player in order to function properly."
In addition to this, users are saying "that some of The Matrix HD-DVD discs are having compatibility issues as well. Reloaded seems to be the most commonly reported problem disc, specifically on the Xbox 360 add-on drive." Some feel that firmware updates might be able to remedy this.
Also, in a non-movie related item...
It looks like "Sony's about to give the PlayStation 3 a new update (available now - version 1.80) that will reportedly allow the unit to upconvert PS2 and PS3 games, as well as standard definition DVDs, to 1080p video. Other new functionality is being added as well, including downconversion of 1080p Blu-ray content to 720p for some displays."