emf enhanced text trouble

I am using the emf terminal with enhanced text mode.
There is trouble with superscripts, e.g.
      set xlabel "x^2"
works OK, but when the text is to be rotated, as in
      set ylabel "x^2"
the positioning of the superscript 2 is all wrong--it is spaced over way to
far with the equivalent of about three blank spaces between the x and the 2.
In addition, it is slightly too high--it appears to be placed on the line
above the x rather than halfway up as in a true superscript.

Is this a known bug? Is there a workaround?

I'm using version 4.4.

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