i wonder, how essential entity replacement (and in particular numeric entity replacement) in URLs is, since URLs should be url-encoded, so there should be no ambiguity in the interpretation of the string. See e.g. the statement from W3C for the coding of UTF-8 in URLs: http://www.w3.org/International/O-URL-code.html
Actually, I wonder why tclwebtest is doing entity replacements in URLs at all.