I thought that I had seen a post where someone else had the same problem, the caulk between the glass and frame had opened up.
I remembered "small boy" and searched and found this:
Wet Seatbelt
Look at the one where there is a picture of the quarter window and words like spray water here.....
Permalink #73. He has another post on the next page and indicates what he did fixed his problem.
__________________
2001 Red CVT
19,351 miles lmpg 19.0 as of Oct 7, 2011
Best tank 78.9 MPG, 738.9 miles
Email
dave@groe.us