you might want to make sure the cyrillic directory (usually /usr/lib/X11/fonts/cyrillic) is in your font paths, e.g., in your X config, /etc/fonts/, ~/.fonts.conf, etc. otherwise, afaik it should work with the default kernel options, did you upgrade your kernel? does it screw up with all browsers or just one?
mouse type: change from what to what? can't really help without more info.