I have always used DVD-lab PRO for authoring. I recently tried Encore for it’s great Photoshop integration and the export as DVD/Blu-ray/Flash feature; you know, trying it myself to see if it really is as good as some people say, or as bad as others claim.
Besides, I don’t know if it’s a DVD-lab issue, but my subtitles ALWAYS show earlier, no matter which timecode option I choose (and yes, I’m sure that they are correctly in sync with the video before authoring) Also, when I import subs they don’t preserve italics, very annoying. I’m doing the same project in Encore to see if subs are properly synced this time.
Now that I think about it… maybe subs have always showed earlier because till now (changing N/M value in CCE from 5 to 4, thus, GOP length of 12 frames instead of 15) my files never had the correct GOP length and timecode was all messed up. I will do some testing later.