[imp] Fatal error: Cannot instantiate non-existent class: browser

[Heather Barnes]

Hi,

I have received the following error and have been unable to find any
reference to this specific error message in the faq or mail list
archives.

Fatal error: Cannot instantiate non-existent class: browser in
/path/to/apache/htdocs/horde/imp/lib/base.php on line 27

I have php installed as DSO and am running horde 2.2 and imp 3.2.

Anybody know were this class is supposed to be defined?

Any help or direction to documentation on this would be greatly
appreciated.

Thanks,
Heather