When switching between windows, e.g. from the board to the console to type "Hello" to the other player, there is a delay of several seconds until the window is activated (comes to front and receives focus).
This seems to be specific to Solaris; on Linux I don't see this odd behaviour.
Other minor bugs regarding Solaris:
In the main jin shell script,
1. add "-client" to JAVA_OPTS.
This does not seem to make any difference (on my machine java defaults to start in server mode), but won't hurt.
2. change "grep" to "/usr/sfw/ggrep"