Help->Installation Details->JBoss Central page (the one where installed Early access plugins are shown) is completely blank until the dialog is resized.
I've reproduced it on Fedora 22, KDE, with GTK2 and GTK3 and Fedora 22 with Gnome (three different machines).
This issue is happening only in JBDS. I've tried to reproduce it in JBT 4.3.0.Beta2 with no success.