Does anyone know why wordpress converts some html entities to their numeric equivalents?
I've found that in some posts, where a non-breaking space entity would be appropriate, wordpress uses   instead.
Seems to me that using the symbolic version of the entity would be better than a numeric version.
The routine that this is being done in (appears to be) ent2ncr in wp-includes/formatting.php.
When I converted my blog from a single site to multi-site (different install & database), the numeric entities were not converted properly (possibly due to a database difference). Had the symbolic entities been used, I doubt this would have been a problem.