And by the way ... I also heared of these problems about plugIn incompatibilities at doom9-avisynth forum.
Maybe its not the problem in this case, but ..... as I know that many people use that (IMHO horrible confusing making )"AVS switcher" sometimes they forget to switch back!
As mentioned in the AVS Guides there's a very very easy and comfortable way to just perform every avs 2.0 plugin you need in a AVS 2.5 script without everytime typing that boring "LoadPlugin("C:\Programme\AviSynth 2.5\Temp\LoadPluginEx.dll")".
Write an AVS script including the following lines:
##################################
LoadPlugin("C:\Programme\AviSynth 2.5\Temp\LoadPluginEx.dll")
LoadPlugin("C:\Programme\AviSynth 2.5\Temp\Dustv5.dll")
LoadPlugin("C:\Programme\AviSynth 2.5\Temp\My other often needed AVS2.0 PlugIn.dll")
LoadPlugin("C:\Programme\AviSynth 2.5\Temp\Also a needed AVS2.0 PlugIn.dll")
##################################
Safe this script using a *.avsi istead of .avs and safe this .avsi file into your AVS 2.5!! PlugIns Folder
So this .avsi doc will be seen by AVS 2.5 like a .dll which will be loaded on every startup ... so the generally needed AVS 2.0 .dll's will be present and you just have to type within an AVS 2.5 script the command of the used AVS 2.0 FIlter
Example:
########################
Avisource("D:\Xvid.avi")
BlindPP(CPU=4)
Deen("a2d",1,10,12)
ConverttoYUY2()
Pixiedust()
...... and so on ....
########################
But!! Do not put the "LoadPluginEx.dll" in the same folder like your AVS 2.5 Plugins!!! Just create for example as shown in the path within the script a "temp" Folder within your AVS 2.5 Root Folder on your HD and put your "LoadPluginEx.dll" and the other AVS 2.0 Plugins there.
Second!! Only use AVS 2.0 Plugins which you do not already use as 2.5 Plugins!!! So it could be dangerous to have a STmedianfilter.dll activated as AVS 2.0 dll and also as AVS 2.5 dll cause the command "stmedianfilter(xx,xx,xx,x,x,xx,) will call the needed Plugin and by existing 2 loaded dll which will be called by the same command could cause problems!