I tried to run a webapp which uses the JSTL taglibs on JBoss using tomcat 5.0.16 but JBoss reports that it cannot find any TLD descriptors.
If I run the webapp in a standalone tomcat 5.0.16 everythins works fine.

I ran tests with compressed or uncompressed .war archives and with TLD declarations inside web.xml or without but the problem remains.

I created two test war archives as testcases which depict the problem:
http://53.122.216.221/temp
The testcases are named:
- tld-bug23.war which contains JSTL for serlvet 2.3 + JSP 1.2 specs
- tld-bug24.war which contains JSTL for servlet 2.4 + JSP 2.0 specs