Pango-WARNING **: Invalid UTF-8 string passed to pango_layout_set_text()

Installation & Configuration Linux
#1

hi, when i load some vst plugins, like latest mdaxxxxx.dll(for example), i see

Pango-WARNING **: Invalid UTF-8 string passed to pango_layout_set_text()
in console and in plugin window have not sliders , just some little squares with letters inside on there places.
why there happens and did some have that problem and fix it?
mda from sourceforge(latest win version)
p.s. sorry for my english.

#2

p.p.s. in jost(http://www.anticore.org/jucetice/?page_id=4), the same(for linux) plugin work normally