Hello, 

If you increment an array using advanced indexing and have repeated indexes, the array doesn't get repeatedly incremented, http://comments.gmane.org/gmane.comp.python.numeric.general/50291. I wrote a C function that does incrementing with repeated indexes correctly. The branch is here (https://github.com/jsalvatier/numpy see the last two commits). Would a patch with a cleaned up version of a function like this be accepted into numpy? I'm not experienced writing numpy C code so I'm sure it still needs improvement.