Users on Linux have reported they get the following error while running DbVisualizer:
java.lang.NullPointerException: Failed to retrieve atom name. at sun.awt.X11.XlibWrapper.XGetAtomName(Native Method) at sun.awt.X11.XAtom.getName(XAtom.java:186) at sun.awt.X11.XDataTransferer.getTargetNameForAtom(XDataTransferer.java:166)
This problem is related to the X server on Linux. Some have reported that re-starting the X server fixes it while others confirms that restarting the X clipboard helped (http://www.skybert.net/java/x-related-java-problems/).