I just ran into a situation where I got bitten by a line tabulation character (\u0008) in some TLF text. Apparently Powerpoint uses that character for new lines within a paragraph. I believe that \u2028 is more appropriate for that use case. \u0008 renders XML invalid while \u2028 does not.
As a point of reference: InDesign uses \u2028 for soft returns. Can anyone think of any valid reason not to replace \u0008 with \u2028 when text is pasted into TLF? Harbs