WebSphere v6.1.0.11
I've created a Shared Library whose classpath contains:
${shared-library_[user-defined]}
${shared-library_[user-defined]}/bogus4.jar
${shared-library_[user-defined]}/bogus1.jar
${shared-library_[user-defined]}/bogus2.jar
${shared-library_[user-defined]}/bogus3.jar

I've defined the environment variable:
shared-library_[user-defined] = /www/mattTest/shared-library

I've added a classloader to the jvm that references the Shared Library.

After bouncing the jvm, the new classloader appears, but its classpath contains:
/www/mattTest/shared-library/bogus4.jar
/www/mattTest/shared-library/bogus1.jar
/www/mattTest/shared-library/bogus2.jar
/www/mattTest/shared-library/bogus3.jar
/www/mattTest/shared-library/jaxb-api.jar
/www/mattTest/shared-library/activation.jar
/www/mattTest/shared-library/jsr173_1.0_api.jar
/www/mattTest/shared-library/jaxb1-impl.jar

Anyone have any idea as to where the last 3 jars came from? They were not specified by me, nor do they exists in the referenced directory.