Hi, here are some regressions with fltk 1.3.  I reduced the file
demonstrating the problem as much as possible, it's still 150 lines
but should be clear.  I haven't dug into the fltk side yet to see
where the problem lies, but I won't have time for the next few days so
I thought I'd throw this out first.

Problem 1 is misaligned text.  It looks like spaces are kerned widely,
until the text changes color, at which point it thinks you were using
a narrower kerning.  The result is that text in a different color is
further to the left than it should be.

Problem 2 is slowness.  It should be obvious when you run the program,
both inserting lines (it seems to get linearly slower on each insert)
and when resizing the window.

Problem 3 is with word wrapping, if you look carefully when resizing
the window you'll notice that a word is cut off about %50 before it
gets wrapped to the next line.

Compiling with 1.1.9 the colored text is properly aligned and
insertion and wrapping happens instantly, although I just noticed that
the wrapping is different after insertion and after the first resize.
Interesting, maybe there's a bug in 1.1.9 too?

I initially thought this was a cocoa thing, but it's the same when I
turn of __APPLE_COCOA__, so I'm guessing it has something to do with
the new UTF8 support.  As before, this is on OS X 10.5.8.

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