InfoPath Dev

In IP2010, Advanced Form Options, Capability, Form Type, what is the difference between InfoPath Filler Form and an InfoPath 2007 Filler Form?

I'm asking because when I publish my form, users are being prompted to update to the newly published form. None of the workarounds I've seen or tried are particularly appealing.

I'm currently using the InfoPath 2007 Filler Form type, but when I tried to switch one of my existing forms to the InfoPath Filler Form type, the new form was pushed down and accordingly, there was no prompt for the user to update to the new form. The form seems to be working fine as well. This is the behavior I used to have with IP2007 and that I want now. Am I losing anything by switching to InfoPath Filler Form?

 Thanks.

I found an answer to my own question. After some searching, it looks like the InfoPath Filler Form type is the IP2010 type. Found it confusing when I saw IP 2003, IP 2007 and then just plain IP Filler Form. But problem resolved.