Ok. I've upgraded the firmware and did a verify as you suggested and it went fine. Then I tried to read the disc and it didn't go to well...Why ? The ibg files for the two operations are attached.
The machine I use : Pentium P4 2.66 Ghz, 1 GB ram, Win XP SP3
Edit :
I might have found the reason for the slowing down. As you said earlier Lightning UK, it could be someting to do with the speed of the system. And I think you're right.
I ripped the DVD with DVDDecrypter again to see if it worked ok there, and it did, BUT it never went over 11-11.5x in ripping speed. The Pioneer DVR-115D rips up to 16x and does so in the Verifying example attached to this post. But that is verifying without storing anything on the computer. And when I try to read from the drive, it gets up to approx. 11x before it slows down (alot, unfortunally). That, I think, is because the computer cannot store the data fast enough to keep up with the drive. Its a bit strange since the harddrives are UDMA Mode 5 drives, but the teory fits.
I'm writing this edit on another machine and cannot test this teory yet, but I'm gonna set the reading speed on this drive to 10x, 11x and 12x instead of MAX later this evening, and see what happens.
One question though : If this is right, why doesn't ImgBurn stay at the "max" speed it can get from the system like DVD Decrypter does ?
Test_Verify_Without_ImageFile.ibg
Test_Normal_Read.ibg