Reproduce steps:
1. On Quicksilver03, jdk1.5.0-beta-b32
2. Start a mozilla, select Tools->Web Development->Java Console.
3. Close it and reopen the java console. There is an additional button "close" on the bottom of console. That is, there are four buttons on console.
4. If resizing the console's width, there will be many buttons which overlaps each other.