[squid-users] strange behavior with GET queries containing +(plus) signs

Browser makes the following request:
GET http://www.google.com/search?q=c%2B%2B

But squid transforms it to:
GET /search?q=c++

(This was discovered using tcpdump)

And so, google returns incorrect search results for my query. When I
use direct connection to internet, all is ok.

Other special symbols with codes less 127 (like & and ?) shows the same problem.

-- 
To understand my English you must be Russian =)