Honestly, these changes have been a long time coming. Turkish Air changed their fare classes a while ago, adding in their "Comfort Class" premium economy product and pulling out their first class cabin. Many of their partners were quick to update the earning charts; Continental and United Airlines weren’t. That has finally been resolved as of today.
The new earning rates are mostly downgrades on the Continental side of things. Y and B fares no longer earn 150% EQMs and G fares – one of the most discounted economy class tickets – now earn nothing at all. There are a few other changes, with F, W and Z fares also no longer earning but I believe those fares are also no longer published so less of an issue.
The Comfort Class fares will only earn at 100% (US Airways and Air Canada both have an earning premium assigned to those fares) which is unfortunate. That said, the change does at least add all three of the Comfort Class fares to the list; previously one was absent.
On the United side of the coin the earning rules are similar, with one additional downgrade. Elite members will no longer earn the 500 mile minimum credit on flights operated by Turkish. Not a huge deal, as most TK-operated flights are longer than that, but still a minor downgrade.
Also of note is that with both programs the V fare class will be deprecated as an earning bucket come January 1, 2012. This is another discount economy fare bucket and losing it will be unfortunate.
Finally, there has been an addition to the earnings tables. Flights marketed by Turkish but operated by AnadoluJet (a regional/express carrier) will be eligible for earning in both programs. The cheapest economy fares (L, Q, T, V) do not earn while non-discount fares (Y, B, M, K, H, S, E) earn at the 100% rate, again with no 500 mile minimums.
All of these earning rate changes have been loaded into the mileage earning calculators on the Wandering Aramean Travel Tools site.