Help needed - grid is very slow on some machines

I have got several reports that grid works very slow on some machines (and fast on others using exactly the same code). I cannot reproduce this myself and don't know yet why this could happen. If anyone had the same problem - could you please tell me as much details as possible about what exactly is wrong (slow) and what is machine/browser configuration when it happens?

I can tell you one reason since I had the problem. I was using a TNT card on a 3ghz machine and the grid performed crap wasn't due to the code just the fact I was using poor hardware in a fast machine. everything was ok as soon as I put a geforce2 in.

Another thing which still effects grid performance is 30+ rows in 1280x1024 display when the grid is full screen. but again this is due to the browser not actual code. I do wonder if it is due to too many divs in one div and it's a performance problem in most browsers since a table with similar amounts of data is very fast.

Another thing maybe are you stopping the bubbling of events after you consume them not looked at the code that deep but since there is many divs this could cause a performance problem