Don't know what you changed, but now code like:
Code:
<span epub:type="pagebreak" id="page39" title="39"></span>
or
Code:
<span id="page39" title="39"></span>
is adding a line of space where there shouldn't be one. These are usually used for page numbers in epub. Before version 1.10 of your plugin the line space wasn't there, but now it is. Explanation?