1. On page 148 (second edition):

    <Frame name=“MyFrame1“ parent=“UIParent“>
          <Size x=“50“ y=“50“/>
          <Anchor>
            <Anchor point=“CENTER“ relativePoint=“CENTER“/>
          </Anchors>
        </Frame>
        <Frame name=“MyFrame2“ parent=“UIParent“>
          <Size x=“50“ y=“50“/>
          <Anchor>
            <Anchor point=“TOPLEFT“ relativePoint=“TOPRIGHT“ relativeTo=“MyFrame“/>
          </Anchors>
        </Frame>
    

    I think the Anchors tag is missing an "s" when being opened both times. And when the second frame is anchored to the first one, a "1" may be missing after "MyFrame".

    Thanks for the heads up!

    Added to the Errata for Chapter 8