I recently upgraded Mobipocket Creator Publisher Edition to v4.2 build 41 from build 40.
I also upgraded my Mobipocket Reader to Version : 6.2 Build 608 from an older build.
Now, some html codes for curly quotes and apostrophes are "gone" i.e. so little boxes! I was upgrading my Webster's Dictionary 1913 (ver 2.1) and noticed that the same html code renders differently (see below images) from the ver 2.0 Dictionary I posted earlier. The ver 2.0 ebook appears find in the updated Mobipocket Reader.
Here's the Html code (I put a space between the &# and digits so that you can see them) for the "Frequent" dictionary entry:
<idx:entry><p><big><a name="MBP_TOC_E494"><b><idx:orth>Fre&# 180;quent</idx:orth></b></big> , <i>a.</i>
[L. <i>frequens</i>, <i>-entis</i>, crowded, frequent, akin to <i>farcire</i>
to stuff: cf. F. <i>frequent</i>. Cf. <a href="#MBP_TOC_D014">Farce</a>, <i>n.</i>]
<b>1.</b> Often to be met with; happening at short intervals; often repeated or occurring;
as <i>frequent</i> visits. &# 180;<i>Frequent</i> feudal towers.&# 180; <i>Byron.</i>
<b>2.</b> Addicted to any course of conduct; inclined to indulge in any practice; habitual;
persistent. &# 8220;He has been loud and <i>frequent</i> in declaring himself hearty for the
government.&# 8221; <i>Swift.</i> <b>3.</b> Full; crowded; thronged. [Obs.] &# 8220;&# 8217;T
is Caesar&# 8217;s will to have a <i>frequent</i> senate.&# 8221; <i>B. Jonson.</i>
<b>4.</b> Often or commonly reported. [Obs.] &# 8220;&# 8217;T is <i>frequent</i> in the city
he hath subdued<br>The Catti and the Daci.” <i>Massinger.</i></p></idx:entry>
I don't know what caused this: Mobipocket Creator alone or combination Creator/Reader.
And, yes, I have installed the ETI software as well, but can deal with that .opf file association problem.