Hmm. I was too hasty.
After double checking, I see that I was wrong about panoramas created with ICE. My humble apologies to you, ejain. I had tried some of the photos from the weekend as both ICE panoramas and as synths and was incorrectly mapping my memories of the synths being auto-geotagged onto the panoramas as well.
As to pasting the coordinates into the search field on the map not being accurate enough, though, it should put those coordinates perfectly in the middle of the synth editor's viewer, and honestly if you were standing there, you should be able to recognize for yourself where you were standing.
In any case, I agree that it would be useful to manually type in the lat-long for the pin.
Cheers, and I hope you'll forgive my quick response.