There was some issues with the modulator in early boards, don't know the revision offhand, only that mine has the problem. I think there's a fix on aminet. I was never thrilled with the picture on a TV before the modulator went screwy so haven't bothered to fix mine, since I was first using it with an RGB Monitor/TV then a 1084S. Might have been a PAL only issue, not sure.
Edit: actually I'd have thunk if those guys know their stuff, they'd have checked for the issue and patched it if present, if it was gonna go, it woulda went by now.