Since installing SP1 yesterday I'm having lots of problems with VS misreporting errors. Usually in the form of "The name txtCompany does not exist in the current context" when it clearly does. Double clicking the error takes me to the offending code at which put VS correctly decides it's not an error and takes it off the list.

When I build the solution everything is ok it's just a little off putting.

Any one else experienced this? I've not found anything by searching.