There is a well known (for not native English speakers) bug — "Go to PDF" does not work in Windows if the latex file's path consists of unicode characters. I've just realized why it happens
As I know, SyncTeX always encodes .synctex files by UTF8. TeXstudio uses QFile::decodeName (PDFDocument.cpp, 2819) to decode paths from .synctex file. It's fine while paths does not consist of cyrillic letters :-) QFile::decodeName uses a system's code page, but it's a wrong behaviour in Windows (remember — paths are stored as UTF8 strings).
Take a look at the patch. Now "Go to PDF" works for me with these modifications. But it is necessary to do tests for other systems and languages.
Yuriy Kolerov