Strange warning message

Hi there,

I just got the following warning message at the bottom of one of my PHP
pages, which ran with no problems up until very recently:

Warning: Unknown(): Your script possibly relies on a session side-effect
which existed until PHP 4.2.3. Please be advised that the session
extension does not consider global variables as a source of data, unless
register_globals is enabled. You can disable this functionality and this
warning by setting session.bug_compat_42 or session.bug_compat_warn to
off, respectively. in Unknown on line 0

I think possibly our server was just upgraded or something. But does anyone
know what this means? The script in question does use sessions, but I'm not
sure what it means by "session side-effect". Could this be from trying to
read in variables posted via a form into the session? I've been doing that
all along, and it never gave me any problems until now...

Lynna

--
Resource Centre Database Coordinator
Gallery 44: www.gallery44.org
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