Stalwart Defender bug or nerf?

[Grenada]

This isn't really that big a deal, but I haven't found it anywhere in the release note for U9, but wanted to check with the forum community before taking any other actions.

Right after U9 my defender's DR while blocking dropped from 26 to 20 (same items equipped). Does anyone know why? I don't really mind, seeing as 20 is good enough for him at the moment, but it makes me wonder what happened to it.

[RudyMcghee]

Did you have the shield feats that increase blocking DR? Those were changed to give a static % DR. 3 each i believe is what they were, so 6 total DR.

[gyerv59]

Changes to shield mastery and improved shield mastery.

Shield Mastery Passive Physical damage vulnerability is decreased by 10% when using a buckler or small shield, 15% when using a large shield, or 20% when using a tower shield. Shield Proficiency: General

Improved Shield Mastery Passive Physical damage vulnerability is decreased by an additional 5% when using a shield, for a total of 15% when using a buckler or small shield, 20% when using a large shield, or 25% when using a tower shield. Shield Mastery, Base Attack Bonus +8

Improved Shield Bash Passive Enables the character to retain the shield bonus to its Armor Class when using Shield Bash, and grants a 20% chance to make a secondary shield bash while attacking with a melee weapon. Shield Proficiency: General

[Grenada]

That would be it, thanks. I didn't think of the feats when I checked the release notes.