Running 10.2.5 here on the machines at the Towers - Danny, me and Sick Squid are all Mac types.
Rock stable OS - never switched off (portable included) other than restarts after upgrades. However, as 10.3 will be a paid upgrade I'd follow the suggestion to wait.
Very happy to report that PPRuNe now renders correctly with the latest build of the Safari browser. Very impressed with what they've done with it so far
Regards
Rob