Zend (javaw.exe) using 100% CPU

Many thanks to Alberto Miranda who gave me the solution to a grave problem - Zend Studio 5.2.0 suddenly (without me changing anything that I'm aware of) started using close to 100% of CPU time (actually, the Zend process no - it was the javaw.exe process - but it was spawned by Zend). I used Alberto's solution (unchecking the "Use OS Look and Feel" option in the Zend preferences) and, after rebooting the computer and rebooting Zend (which was DEAD slow until it was fully launched) fixed the problem. Alberto, m'man, I owe you unas copas!