[enuddleyarbl]

Just a follow-up. After doing more research, I found that I could assign IDs to the tables and use those with # to apply the styles/classes to particular tables. I think I've got it working. The HTML for the table definitions used to look like:

    <table cellpadding="4" cellspacing="0" style="width:100%" class="calibre18">
        <colgroup class="calibre19">
            <col style="width:50%" class="calibre20"/>
            <col style="width:50%" class="calibre20"/>
        </colgroup>
        <tbody class="calibre21">
            <tr class="calibre22">
                <td class="calibre23">
...

Now, they look like this:

    <table id="an3819">
      <colgroup>
        <col/>
        <col/>
      </colgroup>
      <tbody>
        <tr>
          <td>
...

My table classes in stylesheet.css look like:

table#an1111, table#an2315, table#an3477, table#an3819, table#an3988 {
  table-layout: fixed;
  width: 100%;
  border-spacing: 0;
  border: 1px black solid;
}
td {
  border-collapse: collapse;
}
table#an1111 td, table#an3477 td, table#an3988 td {
  width: 50%;
  border: 0;
  padding: 1px;
  vertical-align: top;
}
table#an2315 td {
  width: 50%;
  border: 0;
  padding: 0;
  vertical-align: top;
}
table#an3017 {
  table-layout: fixed;
  width: 100%;
  border-spacing: 5px;
  border: 1px black solid;
}
table#an3017 td {
  width: 50%;
  border: 0;
  padding: 5px;
  vertical-align: top;
}
td {
  border-collapse: separate;
}
table#an3819 td {
  width: 50%;
  border: 0;
  padding: 4px;
  vertical-align: top;
}

Personally, since the difference between cellpadding/cellspacing of 1/0, 4/0 and 5/5 are so minor, I'm heavily considering just making all the classes the same. Also, with these settings (much of which I grabbed from the classes that used to be associated with the table elements), I don't see any difference between border-collapse: separate and collapse.