[horde] Horde 3.0.x and PHP > 5.0?

[Liam Hoekenga]

I know that horde 3.0.x is super old at this point, and we're planning 
on moving to 3.2.x when it's released, but in prepping for said 
released, I'd like to upgrade php on our webmail servers.  We're 
currently using 4.4.x.  Horde 3.0.x says that it supports up to php 
5.0.x..  can anyone vouch for it's ability to run using 5.1.x or 
(preferably) 5.2.x?

thanks!
Liam