Tuesday, February 17, 2009 arxiv file was changed.

p. 6, 2nd from last paragraph (n,r), r\ge n [not n-1]. 

p. 34: Right above Thm. 6.15 I've put "The thetas on \sH_- are odd and therefore their theta-nulls are automatically zero." It's in the proof, and I should have put it in the statement.  

Saturday, October  3, 2009 Used acrobat to change the arxiv file by hand, but not redone on arxiv site.

p. 12, first line of expression (3.3). Change the expression that looks like \bg_{\frac{n-1}2,+} to [\bg{\frac{n-1}2,\bullet}].