I was more or less following TDE by compiling new version  using 

on Slackware 15.0 i586 with 6.1.44 x64 self-compiled kernel and X11 installed into X11R7

I think it works generally OK but today I tried to add shadows using compton-tde and while I can make moving windows slightly transparent (so compositing itself works) I can't make shadows show up.

I tried to put compton.conf I found on github into

.config/compton-tde.conf but it apparently does not make a difference?

Where default compton-tde.conf usually located?

Second question - on xrandr resize (for example switching away from fullscreen mode in old SDL1 version of qemu)  TDE likes to maximize by horizontal dimension all my windows! Probably something is misconfigured, but what exactly? Any ideas where to look? I prefer not to nuke my .kde ... (there was KDE3 previously)