You mean a non-descript, default java icon shows up in the dock?
I've noticed that happening. In fact, I've got one in my dock right now
I don't think the behavior is specific to JBossWS, though, and I'm not sure you could call it a problem. I think you may be able to observe this behavior after running any JBoss application for any length of time.
Related to output/logging maybe?
OS X 10.4.8/JDK 1.5.0_06/JBoss 4.0.5
I'm working on Portal and the app pops up as soon as we access WSRP (which uses JBoss WS) so I'm pretty sure it's related to JBoss WS. I haven't looked into it in great details for lack of time but it didn't use to happen. I think it started with JBWS 1.0.3 (though I cannot say for sure).
And it is a problem if it uses Swing-related classes that can cause problems in a headless context (at least, I know it was an issue at some point).