Following the release of the Diablo 3 1.0.5 patch, Blizzard Entertainment issues a hotfix with the intention of reducing the damage dealt by monsters on 'Inferno' difficulty (with Monster Power enabled).

Here's the word:

As the title suggests, we're going to be reducing the amount of damage monsters do in Inferno whenever Monster Power is enabled. Before I detail what's changing, though, let me first explain why we're making some adjustments.

When we originally designed and implemented the bonus values for monster damage in Inferno, we were unaware that a bug was causing monster abilities (i.e. Rare and Champion affixes) to not scale correctly with each Monster Power level. While this bug was caught during testing and did not make it into the game, the result of it being fixed meant that monster damage -- specifically damage done by monster abilities -- was ultimately higher at MP1 through MP10 than we intended it to be when 1.0.5 released.

So, to bring monster damage back in line with our original goals for the system, we're implementing a hotfix that will reduce the scaling bonus to monster damage in Inferno difficulty by approximately 25% for all Monster Power levels.

Here are the new damage values that will be hotfixed in for each MP setting:

MP1: 109.60% (down from 114%)
MP2: 120.12% (down from 130%)
MP3: 131.65% (down from 148%)
MP4: 144.29% (down from 169%)
MP5: 158.14% (down from 193%)
MP6: 173.32% (down from 220%)
MP7: 189.96% (down from 250%)
MP8: 208.20% (down from 285%)
MP9: 228.18% (down from 325%)
MP10: 250.09% (down from 371%)

Yeah, Diablo 3, Inferno, haven't been in those waters for a while.