How come I don't see anything when I browse https://svn.jboss.org/repos/common/trunks/ using a web browser? If I checkout this url I'm getting all of the trunks:
[starksm@succubus x]$ ls trunks/ build/ common-logging-jdk/ common-logging-spi/ common-core/ common-logging-log4j/ jbossxb/
There aren't any files actually under the trunks folder. The trunks folder uses the svn:externals property to point to each of the subproject trunk folders.
The trunks folder also does not work under anonymous checkout unfortunately. Because svn:externals only supports full URLs and not relative paths.