Ooh, ooh, new info on patch page!

[Edi]

Originally Posted by JimMorrison

Odd numbered patches are "beta" patches, undergoing brief testing before the even numbered patch is released to us.

I can't remember the story of how we ended up getting 3.17, but the ill-fated performance fix pushed us to 3.2 from there.....

Going from 3.17 to 3.20 had nothing to do with the performance boost fix that was reverted, because that concerned v3.17 only, as you can see from the progress page.