Page with big table and many text inputs is stuck on loading, in IE

Problem: A page with a table with 300 rows and a total of 1500 input text boxes was rendered fast but I couldn't scroll for 20 seconds. It seemed like the whole Internet Explorer was stuck, frozen doing something. I tried several things to find out where the problem was.

• Removed all javascript from the page, still slow
• Removed all elements from the page except the basic structure (html, body, form) and the table with the inputs, still slow
• Took out all id and name attributes from the inputs, still slow
• Removed the form tag, page opened and scrolled fast (we need the FORM though :P)
• Removed the table and kept all 1500 inputs, page opened and scrolled fast (we need the layout though :P)

Tested the page on Firefox and it would load and scroll fast. So all I could find was that a page with a form with a table containing a considerable number of textboxes would freeze in IE for some time. After asking for the help of others, in the hope of some enlightment, we found out that a friend had no problems opening and scrolling the page! I quikly realized that the problem was in the Google Toolbar AutoFill functionality... It seems like Firefox doesn't have the same problem when using the Google Toolbar.