The IE 10 Ajax issue rocked my socks off when I was well into the development of an online store to sell LED Lights.
I think I have found a solution which is good enough for me until IE 10 gets it's act together!
My solution was to copy the following into the <head> </head> section:
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE9" >
You can checkout how this works at the website I used this on at MSBLite: LED Lights.
Hope this helps!