I stumpled upon a really annoying problem when deploying EAR files to a JBoss 3 server.
If I rebuild the EAR project itself or change something in Preferences that triggers a complete rebuild of the workspace (which often also happens if Eclipse crashes) the deployment for the EAR is deleted from the list and I have to create it again.
This only happens to EARs and not deployments of standalone WARs and EJB projects.
This has mystified me for a while, but found that I could easily reproduce it by just rebuilding the EAR project.
I’m running 3.7rc2 with Eclipse M6 on Fedora Core 1 Linux.