Release r516 and the problem remains.
When using international chars like ã, é, õ, ç or whatever, PT chars, on the Separator titles of a group, HG transform that char in two or more question marks (ex: ã goes to ??) and the web page of the HG doesn't open anymore.
I'm using HG on Ubuntu 14.04 right now. No differences from RPi on this issue.
Replacing ã with an a, and ç with a c then HG gets back to normal, but not on really PT language.