qole,
smbclient works with tsocks but browser not?

Did you try to track a bit the problem?
->If /usr/bin/browser overload LD_PRELOAD and maybe bypasses tsocks then?
->Network analyser?

Can you try with wget?

I have no socks server but I can understand that some people might need it..
Did anybody open a bug report "wish" on bugs.maemo.org?