Proposed resolution:

After 27.6.1.3p42 change:

basic_istream<charT,traits>& seekg(off_type& off, ios_base::seekdir dir);

After 27.6.2.4p1 change:

basic_ostream<charT,traits>& seekp(pos_type& pos);

After 27.6.2.4p3 change:

basic_ostream<charT,traits>& seekp(off_type& off, ios_base::seekdir dir);

In the most recent working draft, I'm still seeing:

seekg(off_type& off, ios_base::seekdir dir)

and

seekp(pos_type& pos)

seekp(off_type& off, ios_base::seekdir dir)

that is, by reference off and pos arguments.