2.6.23.17 didn't have the used_vectors bitmap. The first time I could
find it used was in 2.6.24. Where was the code existing in 2.6.23? The
addition may have not been part of the merge, but it was definitely
introduced in the same timeframe, meaning the 2.6.24 release timeframe.
Cheers,
-PJ Waskiewicz
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