In some cases the SystemFlavorMap method setNativesForFlavor() will add an additional encoded String native to the assigned native mappings.

The bug has occured in a stress test case that does the following:

- Aquires all existing DataFlavors from the SystemFlavorMap.
- For each of these DataFlavors, the test will create a new DataFlavor by slightly modifying the MIME type of the existing DataFlavor. For example,
Original MimeType: "text/plain; class=java.io.Reader; charset=Unicode"
Modified MimeType: "text/plain-TEST; class=java.io.Reader; charset=Unicode"
- Then using setNativesForFlavor() method, establish a new mapping using the same set(Array) of String natives used by the existing DataFlavor.
- The test will then request back the mappings with getNativesForFlavor() method and compare to the original set(Array).

Here's an example output from a failing test case:

**** Original DataFlavor: text/plain; class=java.io.InputStream; charset=UTF-16LE
**** Modified DataFlavor: text/plain-test; class=java.io.InputStream; charset=UTF-16LE
****
****
**** TEST FAILS


**** Printing original set of mappings

*** Printing all String Natives
*** Size = 3

COMPOUND_TEXT
TEXT
STRING


**** Printing newly assigned mappings from SystemFlavorMap

*** Printing all String Natives
*** Size = 4

JAVA_DATAFLAVOR:text/plain-test; class=java.io.InputStream
COMPOUND_TEXT
TEXT
STRING

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In the above example, there was an additional encoded String native that was added, and it was not in the original set.

Steps to reproduce:
------------------
The test case AddNativeTest.java is attached to the bug report. It just needs to be compiled and run. The test generates a lot of output so it is convenient to redirect to a file.

java AddNativeTest >myoutput

The test output will indicate a pass or fail for each DataFlavor. In most cases, the test will fail.

Other information:
-----------------
- This bug first appeared in 1.4.0-beta_refresh-b70
- The bug occurs on all platforms
- The bug also occurs if the mappings are assigned with addUnencodedNativeForFlavor() method.