There is something I don't understand! There is no change in the handling of the subtitle timings or in the way the 3D-planes are used between v0.56 and v0.61!
Or, there is only one change in v0.57: I have added the patch for the "correct frame rate" in the XML file. But since then, I have discovered that that patch causes other problems, and therefore I have removed it in v0.59. That cannot be the reason.
Anyway, I will try to compare the code of the two versions to find a culprit, but I don't think there is something really different.