Hi,
Recently I started to get:
 
10:14:22.259     Main Warn DirectWrite: CreateFontFaceFromHDC() failed (Indicates an error in an input file such as a font file.) for QFontDef(Family="Fixedsys", pointsize=9.75, pixelsize=15, styleHint=5, weight=50, stretch=100, hintingPreference=0) LOGFONT("Fixedsys", lfWidth=0, lfHeight=-15) dpi=96
10:14:22.423     Main Warn DirectWrite: CreateFontFaceFromHDC() failed (Indicates an error in an input file such as a font file.) for QFontDef(Family="Modern", pointsize=9.75, pixelsize=13, styleHint=5, weight=50, stretch=100, hintingPreference=0) LOGFONT("Modern", lfWidth=0, lfHeight=-13) dpi=96
10:14:22.442     Main Warn DirectWrite: CreateFontFaceFromHDC() failed (Indicates an error in an input file such as a font file.) for QFontDef(Family="MS Sans Serif", pointsize=9.75, pixelsize=13, styleHint=5, weight=50, stretch=100, hintingPreference=0) LOGFONT("MS Sans Serif", lfWidth=0, lfHeight=-13) dpi=96
10:14:22.447     Main Warn DirectWrite: CreateFontFaceFromHDC() failed (Indicates an error in an input file such as a font file.) for QFontDef(Family="MS Serif", pointsize=9.75, pixelsize=13, styleHint=5, weight=50, stretch=100, hintingPreference=0) LOGFONT("MS Serif", lfWidth=0, lfHeight=-13) dpi=96
 
Regards
Anders