Pear 1.3 Dependencies question

Hi all, on the pages of the Pear base system package (http://pear.php.net/package/PEAR) the dependencies for PHP is (version 1.3): PHP Version: PHP 4.1 or newer However, I am trying to install Horde on Debian Woody and PHP complains that Pear tries to use a function 'is_a' and it doesn't know it. A look at the PHP manual tells me that is_a is only supported in (PHP 4 >= 4.2.0) . I'm running 4.2.1, so ok judging by the pear dependencies. I should say I got my pear from Horde, but it's listed as 1.3 Should I downgrade pear? I'd rather not upgrade PHP manually and break the apt-get update thing. Or is there another way to fix this. Thanks for any help joost DISCLAIMER This e-mail and any attached files are confidential and may be legally privileged. If you are not the addressee, any disclosure, reproduction, copying, distribution, or other dissemination or use of this communication is strictly prohibited. If you have received this transmission in error please notify A.S.T.R.I.D. nv/sa immediately and then delete this e-mail.