Whilst using resharper 5.1 and StyleCop 22.214.171.124 in VS2010 premium, I encountered message:
Warning 27 SA1101: The call to lblFRED must begin with the 'this.' prefix to indicate that the item is a member of the class.
The line concerned is:
lblFRED.Text = string.Empty;
The Resharper integration did not highlight this line as having an error (lblFRED is a win forms label control).
If I change the line
this.lastFRED = this.txtFRED.Text;
lastFRED = this.txtFRED.Text;
then the SA1101 green squiggle appears. The problem does appears even if there are just a few (<20) stylecop issues.
The problem is a bit more involved than I at first thought as I find the rescan all shows the error but a rescan of just the project does not always show it.