What dial frequency should we be using on 144 MHz WSPR?

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WB0DGF
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Joined: 2010/11/15 - 02:39
What dial frequency should we be using on 144 MHz WSPR?

The sidebar here shows 144.489 MHz as the WSPR frequency. WSPR v. 2.11 sets my IC-746 to 144.488 dial. Which is correct?