Bug in DVD navigation handling (long-standing)

[mikec]

Specifically, on the Firefly special edition (UK) box set. The following details are from disc 1, but the same problem occurs on all discs.

Expected behaviour:

The main menu and all episode menus are stored in Pgc 1 in VTS Menu 2. On picking an episode from the main menu, the following should happen:

1) The button action stores the episode number (1-3) in R10 and Links to Pgc 11.
2) Pgc 11 is a generic transition shared by all episodes. It plays a short (single-cell) movie which ends with the background for the episode menu screen, and has a single postcommand Link-ing back to Pgc 1.
3) Back in Pgc 1, the precommands Link to a specific episode menu Prgm (Prgm 1-3, based on and corresponding to the value of R10).
4) Prgms 1-3 are each a single-cell, infinite duration still, like the end frame of the transition but with title text, button text and a episode-specific graphic layered on top. Each Prgm sets up play/language/scene/home buttons.

(Note: Pgc 1 has one cellcommand - "Link TopCell" - but I'm hazy on when these get run.)

Actual behaviour:

At the end of this sequence, the screen is still showing the end of the Pgc 11 transition, not the Pgc 1 Prgm 1-3 still; for most practical purposes, it's an empty screen. The button areas are there and functioning (you can navigate blind) so I'm pretty sure VLC is getting to the right cell in step 4. It's just not displaying the still for that cell.

Setup details:

VLC 1.01 (Intel 32 bit) on Mac OS X 1.5.7, MacBook Pro. Tried deleting prefs, tried original disc as well as HDD rips. I've played these DVDs on many other players with no problems.

This isn't a new or platform-specific issue; it pops up in the forums (for the exact same DVD, though that may just because I was searching for it) going back at least as far as 2004 (viewtopic.php?f=2&t=5662) and including WinXP (viewtopic.php?f=14&t=27666).