Here is our observation.
When I executed the following statement it didn't throw any error and it gave the proper result
Msgbox Browser("index:=0").object.readyState

But all my other team members got the 'General runtime error'. All of us using the same configuration.
Windows 7/IE 8/HP QTP 10

Then we have modified the statement as
Msgbox Browser("index:=0").Page("index:=0").object.readyS tate

No idea how Browser().object.readyState worked for me and not for others?

Any thoughts?