white-space: pre instead of  

[syranide]

Is there a good reason you're not using white-space: pre instead of replacing all spaces with  ? (  isn't enough to cover all cases anyway)

[rocketraman]

No, not particularly. I think it makes sense and would actually allow me to strip out some of the logic for replacing spaces with &nbsp (which, as you said, doesn't cover every case anyway).

[rocketraman]

I will note that use of   is a surface rendering detail though -- the underlying content is unaffected.

[rocketraman]

I'd like to leave this open for tracking purposes. Thanks.