xmedian was commented out by GG as were the following upon earlier report from Andrew:

freezedetect

showpatial

thumbnail_cuda

derain

But if there are parameters that can be included in plugin.opts for xmedian or any that make them work, that would be good to know.  For me, colorhold or any of the new working ones automatically showed up in Cinelerra without having to modify plugin.opts to include them.  phyllis/gg