Why don't you just forget about HTML::TreeBuilder, and parse your stuff with HTML::Parser, doing the right thing when you encounter that type of illegal html.

Better yet, why don't you correct it. I have no idea what "browsers" do with that kind of blooney, but I see no reason for you to keep it alive.

If the appropriate translation is <td align="center">, then just make it.

As far as I know, most if not all browsers just ignore the stray CENTER tags.

You cannot turn to any tool to automagically do with INSANELY STRAY AND ILLEGAL input any kind of ILLOGICAL thing you can think up.