[imp] inbox appears blank after upgrading to RC4

[liamr at umich.edu]

Since upgrading to 3.2 RC4, my inbox appears blank.  I can switch to  
other folders, and see stuff, but when I try to view my inbox I see..


[Mon May 12 14:28:33 2008] [error] [client xxx.xxx.xxx.xxx] PHP  
Notice:  Undefined index:  hd in  
/usr/local/projects/webmail/html-ssl/horde/imp/lib/Mailbox.php on line  
864, referer: https://weblogin.umich.edu/cosign-bin/cosign.cgi
[Mon May 12 14:28:33 2008] [error] [client xxx.xxx.xxx.xxx] PHP  
Notice:  Undefined index:  d in  
/usr/local/projects/webmail/html-ssl/horde/imp/lib/Mailbox.php on line  
864, referer: https://weblogin.umich.edu/cosign-bin/cosign.cgi

(The referrer does change depending on where I've been).

Anyone else seeing this?

Liam