In order to get a good compile, one can simply remove the method, isMimeTypeEqual(). [ bancroft@pc72:/usr/local/src/rhug ] cvs diff classpathx-activation/upstream/source/javax/activation/ActivationDataFlavor.java Index: classpathx-activation/upstream/source/javax/activation/ActivationDataFlavor.java =================================================================== RCS file: /cvs/rhug/rhug/classpathx-activation/upstream/source/javax/activation/ActivationDataFlavor.java,v retrieving revision 1.1.1.1 diff -r1.1.1.1 ActivationDataFlavor.java 167c167,168 < */ --- > * > 178a180,181 > */ > Are there some unit tests to check this modification ? more, l8r, v