hi Dek Ery,
I need something to resolve this problem, cause I want use this JKREATIV theme for another clients from Slovakia, so they will need correct characters in IE or Mozilla for sure. I bet there is some solution if it works in one browser, it should work in other. Please try to check code of theme
Same problem I had with SALIENT theme, but creator of the theme resolved it in code and he is using some checkbox in customization section with text:
“Load external characters in default font.”
If its unchecked, it makes same problem with characters as it is in this case.
Hope this will help you to resolve this issue.