An enterprising critic of Republican senators discovered a flaw in the Republican fundraising machine early Friday morning, delivering an unexpected invective to would-be GOP supporters.

The National Republican Senatorial Campaign Committee website announces the name of each donor that makes a contribution. The donor's name appears in a graphic mid-way down the page.

"Help Elect Republicans to the Senate," it says. "Just like [donor's name] from [donor's location] who donated [donation amount]."

But instead of their name, the critic put "F*** YOU."

Click the image above to see a full-sized screen capture.

The screen capture was captured by Jamie of Intoxination.

"Notice anything in that Help Elect Republicans to the Senate box?" he wrote. "You would think that the NRSC would figure people might do something like that and put filters on it. I guess not."