Are people still using -R ? What's the point now - there are so many advantages of the +R format, it is more error tolerant, and it can be bitset, so why bother with -R ?
Those KPROBES posted are horrid - The PIFs are unusually high its no wonder the disc fails verify. The first that comes to mind is bad media, change media, use better media, invest a few $$$ and buy different brands by units and find out the best match for your writer, if you get lousy results with everything to the point they provide such horrible scans and fail verify then it's time to get an RMA. LITEONs are very good burners when they work but very variable in quality, you can end up with a good batch and end up with a bad one - This holds the same for many other manufacturers now.... The quality control is not what it used to be. One thing with the 811S, its excellent quality CD-R writing.
My favourites for the 1653S at the moment is Verbatim 16x MCC004 and Ricoh (gold discs) 8x RICOHJPNR02.
I usually do not recommend burning DVD video at such speeds. I burn all my DVD VIDEO at 4x. Another thing to keep in mind, DVD VIDEO discs are read at 1x in a DVD player, not at 4x..... So people run KPROBE scans at 4x on a DVD VIDEO, and often see a high or borderline kprobe scan, but reading the same disc at 2.4x would provide a huge difference, and excellent kprobe readings...... So you can imagine at 1x, it would be a whole different story. The 4x kprobe scanning is just pushing the limits - nonetheless, good media should provide good readings at that scanning speed, BUT, seeing high kprobes on some media does NOT necessarily mean the disc will not be playable on your player...... As long as the PIFs are within spec and there are no CRC ERRORS during verification, there should not be any problem.
My favourites are Maxell RICOHJPNR01 and FUJIFILM (RICOHJPN)
The FUJIs produce some of the best kprobes I've seen but they are bloody expensive too