Improved the TrFile_CreateThumbnail function: in case of a corrupt JPEG the plug-in now returns error code codecDataVersErr ($$-8970) instead of the more general noThumbnailFoundErr ($$-8994).
Improved the TrFile_CreateThumbnail function: when the plug-in returns a thumbnail the size is now determined more accurately, and is no longer dependent on internal PICT data.
Fixed a bug in handling of registration strings.
Fixed several smaller issues and bugs and made several smaller improvements.