[jbosstools-dev] Anyone knows what's causing black background in StyledText on RHEL 6.5?

Hi I ran into https://issues.jboss.org/browse/JBIDE-18298 which only happens in RHEL 6.5 (not in Ubuntu 14.4, FC19, FC29, MacOS): The affected widgets are StyledText(s), they get black background color. The StyledText have a transparent png in the background to make them transparent. The StyleRanges used in there only have SWT.BOLD, the background color is left as is (null). I used StyledText since these were the only controls that had text-wrapping and scrollbars done right. The only way I found to make them transparent was to put a transparent png into their background. I have no clue what's causing this. I'd appreciate any hints or ideas. Thanks! André