Am having same problem as tmh.
After a while it seems like the amxmodx just stops working in the server.
I'm not quite as handy with my log files for amxmodx, but I have the exact same symptoms.
I run a cz server so I really need/love what you guys are doing. I love the atac and the stats. And all the basic plugins that you include, not to mention the benifits of small script.
Thank you very much for you efforts....