lol sorry. I've been stuck on our next game and its killing me

You are really close. There are three rules in your file here affecting it:
http://www.australiancrosswords.com.au/WPblog/wp-content/themes/twentyten/style.css#content tr td {
border-top: 1px solid #e7e7e7;
padding: 6px 24px; <<-- this line}
#content table {
border: 1px solid #e7e7e7;
margin: 0 -1px 24px 0; <<--- this line text-align: left;
width: 100%;
}
#content tr th,
#content thead th {
color: #888;
font-size: 12px;
font-weight: bold;
line-height: 18px;
padding: 9px 24px; <<-- this line}
What they are doing is overriding some HTML tags anywhere they appear, which can be frustrating to us plugin guys. What I always recommend is, if you don't care about how they affect your site, just put a misspelling in:
This does not hurt and you can see what you did to undo it later:
#content tr td {
border-top: 1px solid #e7e7e7;
XXpadding: 6px 24px; }
or do it this way:
#content XXtr XXtd { border-top: 1px solid #e7e7e7;
padding: 6px 24px;
}
There are other ways to affect the CSS rules, you can have the plugin override TD, TH, TABLE, and TR in your own CSS and provide it as the CSS argument (see admin panel) but I'd personally just do the above as those rules don't seem to benefit the site as far as I can tell.
Anyway, give a shout if you try this.
-d