Toolbar buttons are too wide on Swing apps on Windows XP using the new Java 1.5 update 8 release. The root cause is that this bug existed in Java 6 with the UXTheme changes (see bug: 6349010) and was fixed later in the release cycle. However, the UXTheme work was backported to 1.5 u8 before this bug was fixed, thus causing a regression relative to the previous version (1.5 u7).