I've verified the following problem (at least it was for me!) in 4.0.2 with HTMLSpecialChars():

If parsing a string that contains a single-quote character (the ' character), it now translates it to ' which broke a few pages I wrote using ODBCSocketServer.

e.g. 

$sql3="select imitmidx_sql.item_no from imitmidx_sql where (imitmidx_sql.mat_cost_type='DRM') and (imitmidx_sql.item_no>='".$specno."') and (imitmidx_sql.item_no<'".$ends."')";
echo (HTMLSpecialChars($sql3)."\n<P>");

This spits out:

select imitmidx_sql.item_no from imitmidx_sql where (imitmidx_sql.mat_cost_type=&#039;DRM&#039;) and (imitmidx_sql.item_no&gt;=&#039;&#039;) and (imitmidx_sql.item_no&lt;&#039;&#039;)
<P>

To the web browser (raw HTML format).  

Again, this may not be a bug and is actually a fix of the HTMLSpecialChars function but it's breaking SQL calls via ODBCSocketServer 0.92.

-Greg