The scan I post here is an example of the problem: in the first part of the DVDs I very ofte get an high amount of errors. The scan refers to a 16x burn (4x effective due to usb bus constraints), but I got the same problem with Infiniti dvds and with higher speed burns (16x burn that switched to 8x at about half disc).
The spike is not always so “small”! I get also 50 PIF and 500 PIE, even if they quickly go down to the usual <5 PIF and <50 PIE.
The firmware is KL0N, I made tests with OHT, FHT on and off, then I settled on OHT on and FHT off, since I get the best quality (or, at least, never a quality decrease).
In all the posts here, I made two scans of the same dvd: 4x and 16x. In the following posts, you see the results of 3 different test dvds, so 6 scans.