Recently I've noticed something interesting with softsubbed karaoke rendering in Zoomplayer. It doesn't seem to matter which computer I use.
I have Zoomplayer version 7 installed on my laptop (Windows 7 Pro, Core 2 Duo P8400, 3GB RAM, 240GB SSD), which I recently upgraded the HDD for. It's two years old. I have version 6 installed on two other computers and my netbook, which can't really handle 720p playback but still has the same problem when I try. When I go to play a 720p video (Oreimo), the karaoke renders but the text filler effect doesn't work. It just fills the line arbitrarily and leaves it at that. If the line stays on screen long enough, it might do two arbitrary line fills.
If that didn't make enough sense, basically it would look like you're singing the same syllable for the entire time the line is on screen.
I recently watched through the 1080p version of Nanoha the Movie 1st on this laptop with no playback problems, aside from the subtitles in there acting the same way, and one small lag during a transformation scene. So, this shouldn't be a hardware limitation problem. All the installations run the latest version of all the codecs recognized by the install center (except one computer might be outdated).
Anyone else have this problem?