I think the advice is still to keep to the western (Greek) side of the passage
, but I and I know many others have been over to the Albanian side several times - you can visit Albania by yacht nowadays - and never had or indeed heard of anyone having any problems.
Actually, the Kerkira Channel is probably only a mile wide at the narrowest point, but it's not navigationally difficult and is the 'accepted' route
to/past Corfu, as all the sheltered harbours and anchorages
are on Corfu's east coast