[kh99]

This is kind of an ugly hack but it works: edit the userinfractionbit template and at the top where the <tr> tag is, change it to something like this:

<vb:if condition="$GLOBALS['userinfractionbit_bg'] = !$GLOBALS['userinfractionbit_bg']">
<tr>
<vb:else />
<tr style="background: grey">
</vb:if>

("grey" actually looks too dark, but of course you can change either or both <tr> tags to style it any way you want).