[mod_python] session variable value (partially) dissapearing

Hi,

I'm experiencing some strange behavior with mod_python sessions
(using the mod_python Session module, which in my setup seems to use
dbm). I'm using Apache/2.2.0 (Unix) mod_ssl/2.2.0 OpenSSL/0.9.8b DAV/2
mod_python/3.3.1 Python/2.4.2 on an Intel Mac (mpm-prefork).

I can store information in the session variable, which I've stored
under req.session, just fine, e.g.

req.session['rememberme'] = 'foobar'

but for some reason in situations I haven't been able to pin down
yet, when I store more complex information, e.g. a dictionary such as

req.session['rememberme'] = {'name' : 'john', 
                             'address': {'road': 'high st',
			                 'nr': 22}}
					 
then often times part of that dictionary value has disappeared when
I look it up again in a later page, e.g. I get a dictionary
containing only the key 'name' instead of both keys. I unfortunately
haven't been able to pin it down further yet (apart from observing
that it seems to appear primarily (?) in situations involving AJAX
POST calls). 

Has someone has seen something like this before? Any hints on what
can cause the disappearance of part of a session variable value? Or
perhaps it for some reason doesnn't read in the session variable
properly in some of the mod_python processes running? Any hints
would be much appreciated!

Best,
Detmar

--
Detmar Meurers, Associate Professor, Dept. of Linguistics, OSU
201a Oxley Hall, 1712 Neil Avenue, Columbus OH 43210-1298, USA
http://ling.osu.edu/~dm/                 GnuPG key on web page