My results on PC-BSD 1.5.1
WinFirefox31.1.0-PV0.pbi: SPAZZO! Awefull!
The forum bits surrounded by [code] tags looks like asci, punctuation marks and non English charactors.
This "may" be due to the custom wine version that wraps this PBI is itself unaware of other fonts on your system.
I'm trying stuff now and will keep in touch. (I need to learn about fonts and wine anyway - thanks for the nudge