fixed by reinstalled the matroska splitter
I am having the same problem with external player (mpc-hc) in MP 1.0.2 with latest Moving pictures plugin. The video file is played correctly and when i close mpc-hc and return to MP, I see the window error.
Mind you, that if I play the video in mpc-hc directly (not in the MP environment), I do not get any error messages.
Tried re-installing directx but nothing changed.
My system is winXP pro sp3.
Any thoughts for a solution?
This is my issue also...not a huge deal b/c the file still plays but annoying in that i have to manually change the icon to switch from unwatched to watched.
None of the suggestion posted work.
for me i have uninstall SAF and i solved my problem !