problem in version 1.8.0 and 1.8.1

problem in version 1.8.0 and 1.8.1

I use this expression $("#[id^='lbl']").html("") for reset labels that show error messages on contact form.

On the version for subject I get the error:
"Microsoft JScript runtime error: Syntax error, unrecognized expression: #[id^='lbl']".

But When I work with version 1.7.2 my from validation work as always.
Maybe I doing something wrong, but I it work on 1.7.2. why it won't work on the newer versions?

I can reset every label by using it ID something like  $('#lblFirstName').html("")
this is a better solution than what I doing now?

Do you need some of my code?
Can this be a bug on jQuery ?