While in the anvil interface, put an item in the open slot as if you are about to modify it using the anvil.

Note that if you are currently mousing over an item in your inventory, the item name in the anvil (where you can change it) is not blurry and easy to read.

Now mouse over an empty slot and you will notice the item name (where you can change it) is now blurry and is somewhat difficult to read.

If you mouse over the item in the Anvil slot (where the first item goes), the name is not blurry.

If you click into the area to change the name, the text remains blurry while editing it.

Screenshots attached (actually, you can't take a screenshot while in the anvil interface (perhaps also a bug?) so these were captured using Windows screenshots).

Apologize if already reported as I couldn't find it.

I also checked to see if it was perhaps something to do with having the debug setting to show item durability. I turned it off and the problem persists after on fresh starts of Minecraft without this debug setting enabled.

It was not an issue prior to this snapshot.