Keht,

I'm not sure if you've found the answer to this or not yet but I would like to help.

I've quickly edited your bit of CSS in module.css and found that the table hover is now working with this bit of added code.

tr.gridHover td
{
background-color: #a51b01;
color:#fff !important;
cursor: pointer; 
}

The only differences of course is that I target the td tag within the tr. I also set the colour as #fff instead of White and placed an !important on it just in case it's being overriden elsewhere.

As the others were saying, it would probably be best to wrap that specific module with a very unique CSS class so you can easily target only that module.

Also, I'm not sure if this would be your preference or not, but I find that consolidating module.css (and other CSS files) into skin.css makes life a bit easier. 

I hope this helps.

Aaron

I don't agree with the last post.

You should never use the generated ids (starting with dnn_)

You cannot be sure they stay the same in new DNN versions.

These ids might actually become very different (shorter) in the future (ASP.NET 4 supports that AFAIK)