space symbol at the end of string and binary params

Hi All!

I use sybase-python and freetds with MSSQL.
And I have the following problem: the space symbol is added to the 
string and binary parameters.
For example:
  c.execute("insert into Tmp (f1) values (@s)",{"@s":"test"})
As a result, field f1 value is "test "
For string params its not vastly actual, but binary data can be passed 
only through params and space symbol at the end is serious problem.

FreeDTS version is 0.62.3
I tried sybase-python 0.36 and 0.37.

P.S. Sorry for my english...

-- 
Andrey Plotnikov