Using Fedora 12 32-bit:

EXEC: download http://www.qa.jboss.com/binaries/RHDS/builds/staging/devstudio-5.0_trunk.product/builds/nightly/trunk/201108260129/installer/jbdevstudio-product-linux-gtk-5.0.0.v201108260129N-H749-M3.jar
EXEC: `java -jar jbdevstudio-product-linux-gtk-5.0.0.v201108260129N-H749-M3.jar
ASSERT: can install using openJDK 1.6 (eg., 1:1.6.0.0-43.1.8.3.fc12) – did not work using 1.6.0_18 (see attached screenshot)

Note:

Cannot reproduce using jbdevstudio-product-linux-gtk-5.0.0.v201108230443N-H744-M3.jar so this is a recent regression since 2011/08/23.