Stick to version 2.0 of Maven Release Plugin

As reflected on bugs MRELEASE-694 (related to MRELEASE-689 and MRELEASE-691), there are some problems generating the release version numbers (like maintaining SNAPSHOT). This may bite without notice if use non-interactive mode. These bugs are still open as of version 2.2.1.

It's a nice coincidence that because of another bug, the Maven Eclipse Plugin warns you if you use a Maven Release Plugin version other than 2.0 :)

Permgen problems and Running Eclipse on Java 1.6 update 21

See this post. Reposted here for future reference.

Weird Eclipse Error...

...and only one Google result for 

"the eclipse executable launcher was unable to find its companion" os x

so I'd better keep a pointer to the solution here...