'Categories by Tag Table' displays all your Categories as rows and Tags as columns in a html table.
You can specify the style most of the table elements through linking to an external stylesheet of your own and styling the elements within the
The best way to do this is to copy the default stylesheet
default-css-settings.css (downloaded with the plugin), edit it as you see fit and then save this new file somewhere else on your website.
Finally provide the URL to your new stylesheet in the options.
Internet Explorer will render the header as text rotated rather than stacked vertically, this usually looks much better.
However if you have problems only in Internet Explorer, then its probably these "nifty rotate text" css rules.
To fix this edit the stylesheet (either the default one called
default-css-settings.css via the plugin editor, or your own external one if you have used the option above) and completely delete the two lines marked that look like this...
filter:flipv fliph !important;
Finally feplace them to match the styles given for