i remember having issues with blank screens in Java for some time now and since i have no Beryl/Compiz enabled and setting the AWT-MToolkit didn't fix all issues, here's another fact:
borderless windows (i.e. "No window decorations") causes the same issue.
As I use PB on a netbook with small screen real estate, i turn off window decorations (no title bar e.g.). For some reasons, setting the java options found in my signature works fine for me (an in the case i do have a white window - happens when hitting F2 from time to time - i turn on window decorations (on Ubuntu by hitting Alt+Space then D) and it shows the contents nicely.
My workaround is to add the following java-options to .bashrc:
export _JAVA_OPTIONS='-Dawt.useSystemAAFontSettings=lcd -Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel -Dawt.toolkit=sun.awt.motif.MToolkit' Thought to add this here for anyone with this specific issue.
-- 188.8.131.52 (184.108.40.206) on Mac OS X 10.12.6
Old enough to remember Natrificial times...