Java Version: 1.7.0-ea-b10
Platforms: ubuntu and fodera core 6
           hostname: venetian.sfbay and sunfire002.sfbay
Problems:
 we have a test case GIFProgressiveDisposalTest, when we run it using b10, it threw exceptions in above platforms, but 1.6.0_01_b04 is OK.
The test case is attached, and the exceptions are as following:
java.lang.NullPointerException
at com.sun.imageio.plugins.common.PaletteBuilder.findPaletteEntry(PaletteBuilder.java:310)
at com.sun.imageio.plugins.common.PaletteBuilder.getIndexColorModel(PaletteBuilder.java:296)
at com.sun.imageio.plugins.common.PaletteBuilder.getIndexedImage(PaletteBuilder.java:145)
at com.sun.imageio.plugins.common.PaletteBuilder.createIndexedImage(PaletteBuilder.java:77)
at com.sun.imageio.plugins.gif.GIFImageWriter.write(GIFImageWriter.java:564)
at com.sun.imageio.plugins.gif.GIFImageWriter.writeToSequence(GIFImageWriter.java:510)
at GIFProgressiveDisposalTest.createAnimatedImage(GIFProgressiveDisposalTest.java:298)
at GIFProgressiveDisposalTest.doTest(GIFProgressiveDisposalTest.java:163)
at javasoft.clientsqe.tonga.AbstractTongaManualTest.initScenario(AbstractTongaManualTest.java:197)
at javasoft.clientsqe.tonga.InstructionsFrame$ButtonHandler.actionPerformed(InstructionsFrame.java:161)
at java.awt.Button.processActionEvent(Button.java:392)
at java.awt.Button.processEvent(Button.java:360)
at java.awt.Component.dispatchEventImpl(Component.java:4401)
at java.awt.Component.dispatchEvent(Component.java:4231)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:258)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

To reproduce the problem:
1. set JAVA_HOME to 1.7.0-ea-b10
2. set FILTER to GIFProgressiveDisposalTest
3. cd /net/sqe1/quality2/swing/Mustang_2d_weekly/2d/src/2D_ImageIOTiger
4. ../../../share/bin/gnumake/linux/gnumake runfilter
5. following the instruction, in the last case, you will see the exceptions threw.
It can be reproducible as always.