IE/Firefox CSS confusion: Why does my table have inside borders on Firefox, but not IE?

I'm having a problem with CSS not displaying correctly between IE and Firefox... The big problem is that we have a ridiculous number of CSS files (and this isn't something that is currently scoped to fix), and I can't seem to find what style is being applied.

Any way, here's what I'm looking at: On the shopping cart page for our site, we have a table (yes, I know) where each row is an item in the cart. On IE, Chrome, Opera and Safari, this table renders fine - everythin开发者_JAVA百科g looks good, borders are all hidden, it looks great. On Firefox, however, while the outer border on the table remains hidden, lines separating columns/rows inside the table are displayed.

I don't have direct links to show the problem, but if you go to

https://store.petango.com/Roc-P6986.aspx

and click the "Add to cart" button, it brings you to the cart page (where you can see the lines showing in FFox, but not in IE).

For what it's worth, this is a third party E-Commerce package that we purchased, and on top of that we hired out our web design to a DIFFERENT third party web developer. Hence the jumbled mass of CSS files/confusion. Trying to look at the CSS for specific TD elements (in Firebug) is basically impossible to read it's so long, but I can't see anything obvious in there either.

I would be thrilled if this is just something stupid I'm missing, and there's a well known mistake that has been made in our CSS that lets it render fine in every browser but Firefox - any help would be greatly appreciated.

A bit of poking around in Firebug reveals that removing the border-collapse:collapse style from the ctl00_wpm_Basket_ctl04_BasketGrid table removes the borders. I'm not even going to try to explain this - the style should be completely unnecessary, as like many of the other applicable styles it's set and reset multiple times at multiple levels... I suspect you're encountering some subtle difference between how styles are applied in Gecko and other browsers; it's probably a bug, but I would encourage you to slim down the test case if you decide to report it...

this isn't something that is currently scoped to fix

It probably should be... Otherwise, you'd better get comfortable using Firebug.

"We fully recognize that IE is behind the game today in CSS support."

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