[pmwiki-users] site + group headers broken?

[Shi Sherebrin]

I followed the advice on http://www.pmwiki.org/wiki/PmWiki/GroupHeaders

and since I upgraded to 2.1.12 from 2.1.b17, I'm getting the site 
header's contents, but not the group header's contents.  even if I just use

$GroupHeaderFmt = "(:include {$Group}.GroupHeader:)(:nl:)";

I find that it doesn't work.

ideas?