www.makemkv.com

Scratch that. It was the wrong Blu-Ray disc.

I'm rerunning the tests with Requiem for a dream.

1.5.3 seems to be working much better. The "This disc uses newer version of AACS protection." error is gone, AFAICT.

8 or 10 runs ripped the disc successfully and while the filesize was not always the same, the video played fine.
log1.5.3_1.txt:-rw-r--r-- 1 1000 1000 33532983832 Apr 5 17:44 /tmp ...

Results for 1.5.1:
6 times "This disc uses newer version of AACS protection"
3 successful rips
1 time a similar symptom as http://www.makemkv.com/forum2/viewtopic.php?f=3&t=1092 was experiencing. An endless loop around:
PRGC:3406,0,"Processing BD+ code"
PRGV:0,10537,65536
PRGC:3403,0,"Processing ...

Yes, I've noticed that the sha1sum is different every time, but that aside, I still see something going wrong.

I did a few testruns on my main computer where I ripped almost all my Bluray discs before, but I couldn't get the disc to rip successfully everytime, so I assumed bad hardware (maybe bad ...

Yes it has worked before, I have a lot of rips from MakeMKV 1.4.8 and 1.4.10 and one from 1.5.0.

But there seems to be something else amiss. I am not getting reliable results with 1.5.0 onwards.

I'm currently playing with makemkvcon and "Requiem for a Dream Region 1, BD+" (which I know to be good ...

@setarip_old

Thanks, but the source is a genuine commercial region 2 BluRay disc bought from Amazon

Crossing Over (region 2) won't work. I've visited the link in the log output but I thought also posting here won't hurt and might save others a purchase they can't use (yet? :)
Debug log started at Thu Mar 18 09:42:04 2010 , written by MakeMKV v1.5.1 beta linux(x86-release)
Using 524544KB for read ...