Following up on my Feb xx commentary, I now am comfortable recommending switching to Mac OS X 10.5.2 “Leopard” for “production” machines, provided that you don’t use specialized software which hasn’t yet been updated for it.
Mac OS X Leopard Server is another matter; I’m likely to not use it at all for the new diglloyd.com server; it just makes things more complicated to do anything a little different than the stock Apple programs. Documentation and support is quite poor as well (unless you want to pay thousands of dollars to Apple). The “friendly” GUI Apple supplies is nice, but often just gets in the way, after all one must understand the details to really go into “production”, and Apple’s GUI just adds confusion (and bugs), and forces one to learn Apple’s rearrangement of config files for things like Apache. Programs like Tomcat can’t be run via Apple’s setup without also running Apache web server—basic stupidities like that force extra effort to invent workarounds.