Since the August Update to CloneDVD. I have been using HP +R DVD's which have worked fine in the past.
The problem with the belief that using HP dvd+rs should work, since they also worked in the past, is that HP does not make its own blank media.HP uses several different sources (the discs are just sold under HP's label). So, without checking media codes (and serial numbers, and where the discs were made, there's no way of knowing for sure whether you're actually using the same blank media). A lot of HP's 16x dvd+rs are actually made by CMC. If I'm going to buy CMC, it's going to be under Verbatim's label--not HP's.
That said, changing the booktype to "dvd-rom" may very well be the solution you seek.
What blank media are you using? Specify a) brand name b)type (-R, +R, -RW, +RW, RAM, DL, etc.) c)media code, d) capacity/size, e) batch codes/serial codes (often found printed on the inner plastic hub of the blank disc), and f)country (factory information would be great as well, if possible) where the media was made (look on the physical packaging; do not rely on programs to accurately give you this information).
If you don't know how to obtain media codes, you may find the following programs useful:
http://dvd.identifier.cdfreaks.com and
http://www.dvdinfopro.com/
1. Update your burner's firmware (if available)
http://forum.slysoft.com/showpost.php?p=12794&postcount=10
2. Use good quality media (Memorex, Ritek, Princo, Fuji, TDK from Costco, and Maxell that are
not made in Japan are not good quality media).
Are you using inferior blank media? If you're not using Taiyo Yuden (not valuline), Verbatim, Maxell Plus, or Maxell Broadcast Quality, then chances are the answer is yes.
If you use poor quality blank media, then you should expect problems.
visit
http://www.redflagdeals.com/forums/showpost.php?p=4764653&postcount=25
and
http://www.redflagdeals.com/forums/showthread.php?p=3976250
For +R DL blank media, use Verbatim made in Singapore or MAM-A 8x +R DL.
3. Try lowering your burn speed (not below 4x; if you have a 16x burner and 16x rated media try writing to it at 12x instead of 16x; an 8x burn speed on 16x rated media wouldn't be a bad idea either)
4. If you're using +R, +RW, or +R DL media, change the booktype to "dvd-rom"
http://forum.slysoft.com/showthread.php?t=476 (step 3)
5. Avoid sticker labels (they tend to cause problems)
6. Try setting a custom size of 4300 in Clonedvd (but if you're using good media, you shouldn't have to) if you're using regular single layer dvd-5 (4.7GB) discs.