Replaced the only 1.6-specific Swing dependency in Chainsaw with a 1.5 compatible API (MouseAdapter didn't implement MouseMotionListener in 1.5) Chainsaw now builds fine with JDK 1.5 and appears to run on a 1.5 JVM without issue. Chainsaw will NOT compile with JDK 1.4.
logging/chainsaw/trunk/src/main/java/org/apache/log4j/chainsaw/LogPanel.java