>I really want Microsft to fix this bug where grid row highlighting and sparse=.f. do not work properly. I know it has been discussed around here a lot, and I know there are work-arounds, but good grief, can they just not fix it. Have they acknowledged or plan to fix it?
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>How can I make a formal submission on this matter?

You can report issues or make suggestions at https://connect.microsoft.com/VisualStudio/feedback.