Your link is dead so we can't actually see the problem/s
However, if this the first time you've looked at this project in these browsers, I'd suggest you try the following to help track down where the worst problems are:
- Make a copy of the page
- In the code, start removing div elements one by one to narrow down the worst problems.
- Work through your layouts like this until you identify the classes/IDs that have issues - fix the easy ones first
- Post back here on specific errors you cannot solve by comparison. Some issues may require conditional CSS styling