Hi Chris, Long time no catalog questions, I'm guessing you're still the appropriate person? Anyway, I'm trying to track down the bug I posted about earlier today and reading Catalog.py (or Zope 2.4.0b3) in the process. How come lines 672 to 679 seem to duplicate lines 637 to 643? Why not just use the sort_index calculated in the latter? I'm guessign I'm missing something... cheers, Chris