[imp] Undefinded Index: Label

[Bernd]

Hello,

I installed horde and its work very well, but I get a few error  
messages when i use it.
Horde -> 3.1
Imp H3 -> 4.1

when I open a folder from my imap-server i get the error:
Notice: Undefined index: label in /var/www/horde/imp/lib/Mailbox.php  
on line 171

when I reply a message i get after sending:
Notice: Object of class DB_Error to string conversion in  
/usr/share/php/DB/pgsql.php on line 527

I hope I get some help here.
regards,
   Bernd