FilmFX plugin - stains get interlaced ???

Hello,

I have some problem with FilmFX 2.35 plugin for Adobe Premiere 6.5.
When I process non-interlaced material (PAL 720x576), I get all the
stains interlaced or missing every second horizontal line. The problem
concerns dirt, dust, stains, scratches, gate weave etc. The material
under the dirt is OK (non-interlaced).

Am I doing something incorrectly? Can I tell FilmFX that it is working
on non-interlaced material so all the dirt has to be pasted straight?

The one thing I can do is turn on deinterlacing afterwards, but this
is not an option, because this means ruining the original, full-frame
material.

Thank you!