Can you provide more information? Distro and desktop environment?
I cannot replicate this on Mint 13 with Cinnamon.
Gentoo amd64 and KDE 4.8.5
steam installed from gamerlay overlay
I had same bug on Debian Wheezy 64-bit. After I switched Steam interface language from English to Russian this bug disappeared.
Winterheart, what language are you using?
Russian, ru_RU.UTF-8
I can't reproduce this when switching to the Russian locale. I get a space for the separator, as expected.
If you do 'locale LC_NUMERIC' what does it show? Even better
locale LC_NUMERIC > j
hexdump -C j
Then I can see the actual bytes of the separator characters.
My first reaction was that this was a result of the gamerlay overlay, but @chelobaka kinda put an end to that thought.
As this doesn't reproduce for us we'll need more information to proceed here.
Nothing extracted yet.
After installing steam package and running steam I got this screen:
Obviously there must be decimal marks instead "Â"