[NTG-context] Problem with dotted fontname ?

I'm using otf fonts from http://www.sourceforge.net/projects/linuxlibertine ie LinLibertine_Re-4.4.1.otf LinLibertineC_Re-4.0.3.otf LinLibertine_BI-4.0.5.otf Biolinum_Re-0.4.1.otf LinLibertine_It-4.0.6.otf LinLibertine_Bd-4.1.0.otf Biolinum_Bd-0.4.1.otf mtxrun is able to show them, but mkiv fails to load. Problem disappers if one renames them in sane way like LinLibertine_Re-4_4_1.otf -- luigi