FULL PRODUCT VERSION :
java version "1.7.0_40"
Java(TM) SE Runtime Environment (build 1.7.0_40-b43)
Java HotSpot(TM) Client VM (build 24.0-b56, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
With update 40, the following code was added to JDesktopPane:

    @Override
    public void remove(Component comp) {
        super.remove(comp);
        updateFramesCache();
    }

I think I understand why it was added, but I believe it is not correct.  It should not call updateFramesCache if the property componentOrderCheckingEnabled is set to false.  This is how it works the JDesktopPanes other add and remove methods:

remove(int)
removeAll()
addImpl(...)

This is causing an issue in our MDI application when the user hits ctrl-F6 to go to the next frame.  We subclass the DefaultDesktopManager and in our activeFrame code, we have code that eventually calls JDesktopPane's remove(Component method.  This code reorders the "framesCache" which means Ctrl-F6 does not visit all frames.



REGRESSION.  Last worked in version 7u25

ADDITIONAL REGRESSION INFORMATION:
The problem was introduced in update 40 and is still there in update 45.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Using highly customized application so difficult to reproduce in standalone code.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Do not call updateFramesCache() unless the property componentOrderCheckingEnabled  is false.
ACTUAL -
Calling updateFramesCache() even when the property componentOrderCheckingEnabled  is false.

REPRODUCIBILITY :
This bug can be reproduced always.

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I would love to give you a small sample application demonstrating this, but we have special handling in our MDI application so it is difficult to do.  If you really need it, then i can spend more time trying to create one.  My first attempts were not successful.
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CUSTOMER SUBMITTED WORKAROUND :
Override the JDesktopPane's remove(Component) method and copy the Containers code into it.  This is very ugly.