Ran into a curious issue today... it's not really a problem, at least
not for me, but still curious.

Let me establish the parameters first. I'm running XP SP3 with the
"extra" fonts (Far Eastern and right-to-left) installed, so it should
have a pretty good Unicode font coverage. Not only that, but I have the
Code2000 font installed also, which should plug most holes Microsoft
left in their coverage. I have the following browsers available:
- Seamonkey 2.0.3 (primary browser)
- IE 8 (fully patched)
- Firefox 3.6
- Opera 10.5
- SRWare Iron 4.0.280 (equivalent to Google Chrome 4)

So, I'm fooling around on Wikipedia and opened this page:

http://en.wikipedia.org/wiki/Burmese_units_of_measurement

The display of the Burmese characters, though, wasn't working right. A
few of the characters were replaced by little squares with four hex
characters, like on the Unicode BMP Fallback font. Which I had
downloaded but not installed, by the way.
Tried other browsers, with the following results:
- Firefox: identical to SM
- Opera: a few *less* Burmese characters displayed correctly. The ones
that didn't show were replaced with thin blank rectangles.
- IE8: *No* Burmese characters were displayed. Instead, I got blank squares.
- Iron: Same results as in IE8.

Gecko browsers still got the best results of the lot, so I guess I
shouldn't complain (I don't even read non-Latin scripts, I install those
extra fonts just because I think the blank characters are ugly). But
still, a few things puzzle me:
1. Why Gecko and Opera achieve only *partial* success? Is this a problem
with Microsoft fonts? Or does Burmese needs special fonts? All the
browsers seemed to display correctly other scripts, such as Thai and
Chinese.
2. Where did those fallback glyphs came from? As I said, I don't have
the Unicode BMP Fallback font installed, and the other browsers don't
show them. Is that a Gecko feature?
3. Even with all those Unicode fonts installed, the page still failed to
display correctly in any browser. Yet I imagine that it should be
displaying correctly for *someone* -- at the least, the person who wrote
the entry. I wonder if this page only works correctly with Oriental
versions of Windows? Or Macs, perhaps? Or is something really hosed with
my computer?

-- 
MCBastos

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