Some of the border-collapse behavior appears to have changed.

If you use this (add the id to your table tag and remove your inline style attribute):

#tbltest {
 border-style: solid;
 border-color: green;
 border-width: 1px;
 border-collapse:collapse;
}
#tbltest td {
 border-style: solid;
 border-color: auto;
 border-width: 1px;
}

Then the cell borders, with colors matching their contents, override the table border. Firefox 3.6 and 4 appear to agree there.

However, if you switch to the supposedly equivalent shortcut properties, then Firefox 3.6 changes display to what you want while Firefox 4 uses more of the cell-level coloring.

#tbltest {
 border: 1px solid green;
 border-collapse:collapse;
}
#tbltest td {
 border: 1px solid auto;
}

So Firefox 4 appears to have broken a (possibly non-standard) behavior that you and others may have relied on in mixing CSS and the border attribute. The solution, I think, is to set the border color for the td elements explicitly in CSS rather than relying on border="1" to propagate the color from the table element.

Using this kind of code, the borders and text color appears correct: look to the image attached for html code