Improved Shield Bash
From Compendium of Worldly Lore
Needs review
Source: Player's Handbook
Description: You can bash with a shield while retaining its shield bonus to your Armor Class.
Prerequisites: Shield Proficiency
When you perform a shield bash, you may still apply the shield's shield bonus to your AC.
Special
A fighter may select Improved Shield Bash as one of his fighter bonus feats
Normal
Without this feat, a character who performs a shield bash loses the shield's shield bonus to AC until his or her next turn.