A few weeks ago I posted a bit on a Talmud passage, using Rodkinson's translation of the Talmud (the only available on-line). I checked the translation against the Talmud text for the passage I was interested in and it seemed ok (not great, but ok.) There was another passage a few days ago that I was having trouble with so I decided to look at the on-line translation to see if that would help. And I couldn't find it at all. I figured it was my mistake in guessing where the folio number from the standard edition matched up with the page numbers to Rodkinson's edition and went back to my Jastrow and puzzled it out for myself.
Now Manuscript Boy gives a bit of background on Rodkinson and Dan Rabinowitz points out in the comments at Hagahot that it's an abridged translation. Ah hah!