[imp] Undefined property: DB_Error::$phptype

[Michael]

Hello all:

I installed the latest release on a FC4 running PHP5.1.2.

I am getting the following error when I click on any e-mail messages
to read it.

Has anyone incountered similar errors?

NOTICE: Undefined property: DB_Error::$phptype in
/USR/LOCAL/APACHE2/HTDOCS/HORDE/LIB/HORDE/HISTORY.PHP on line 62

FATAL ERROR: Call to undefined method DB_Error::setOption() in
/USR/LOCAL/APACHE2/HTDOCS/HORDE/LIB/HORDE/HISTORY.PHP on line 67

Address Book (turba) H3 (2.1-RC1)
Horde (horde) 3.1-RC2
Mail (imp) H3 (4.1-RC2)

Thanks,
Michael