There is no change to Flex 4.1 or 4.5. We are working on a way to address this. It may be possible to use the FocusManager interface to override tabIndex values when the keyboard focus is inside a TLF object. That way, the cursor would move in the same way you would expect of a browser. It is important to note, however, that TLF and htmlText is not intended to be equivalent to a browser pane. It's a feature that simplifies designing rich text layouts. If you want a fully functional HTML pane, then what you need is a browser iframe. Building a browser out of TLF may technically be possible, but it's a lot more work than you're likely to want to undertake.
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