i tested javax/swing/JTextField/4306756/bug4306756 from Regression suite on sun4v solaris10, it shows 2 gui forms and stays so long time and interupted by timeout, so it has result error(timed out).
It also has timeout on 1.5.0FCS,on another machine (sun4v sol10) it has timeout too. On RHEL5 it passed (export DISPLAY on another machine), it also fails if change timeout from 20 to 50, There is some interestning thing: on sol10 sun4u it passed if NOT export DISPLAY on another machine, but it fails if export DISPLAY on another machine.
  If type some letters and press few time button, test interrupted and fails.