As I mentioned previously, I have one year old Intel based iMac with OS 10.6.3. I have an firewire external G-raid drive, on which I keep all my Toast working files. In addition to the internal burner, I have an external firewire connected Pioneer based blu-ray burner. I've kept all the revisions of Toast upgrades since the 10.0.2. I generate my own videos, both 2D and 3D side-by-side, using the Final Cut Express 4.01. After editing the sequences, I output them as (aic).mov files and keep them on the external drive as well. All my work is 1920x1080, 60i. I do not have Time Machine activated. After I start Toast, I use AVC encoding, avg. rate of 16Mbps, max. at 20Mbps. I never changed the settings. I didn't try to generate discs without menus. The rest is as I described previously. I do not get the error when I use AVCHD setting on DVD with the 10.0.2, or when I burn real BD recordable discs, with any rev. of Toast. I have the problem witth the error code 18771 whenever I use Toast rev. 10.0.3 or higher trying to burn the AVCHD on either the internal or external DVD. The main reason that I care, is because the Toast 10.0.2 has problem using chapter marks created by the FCE. I tried thrashing preferences, re-loading Toast all together, and other previous advices that I came across. Frankly, I gave up and use the Toast/media combination that works, but because I still see the same problem reporting posts going on, I made the input little while ago. If anyone makes their own DVD's using a similar path like I am successfully, could you please post about it? I would like to know if there is something specifically wrong with my workflow or system, or if there is a bug (or if the function is not supported any longer).