After some 60 or 90 minutes of trying to get Renoise to recognize the VSTi in my $VST_PATH I went to Edit -> Preferences -> Misc and found out that the reason for Renoise to not recognize the VSTi was that the default settings only check for $LADSPA_PATH, but not for $VST_PATH.
Maybe enable both by default? I’ve only set $VST_PATH, because there has been advice in irc://irc.esper.net/#renoise that $LADSPA_PATH only overwrites the default directories that would be parsed, and $VST_PATH is the one that should be used.
But exactly that was the problem, if there was no default entry - Renoise-wise - for $VST_PATH, but there was one for $LADSPA_PATH, these precise default settings would be pretty irritating - the other way around would be more sensible.
Though after all I think having Renoise check for both by default would keep this problem off everyones back and make it a little more easier to use Renoise with GNU/Linux.
Feedback?