surprisingly different honda dealers will tell you different things. when i was getting my tyres 205/65/15 i expressed the same concern. guess what the tyre guy told me? he said if honda says there is an issue, just come and get some 195/65/15 tyres from me, get your warranty and then take your tyres back.
was really funny. also technically issue will only be there if the cause of the problem is your change of tyre profile and not otherwise. say your wipers stop working and you have different tyres, they can't tell you that your warranty is void. tyres have nothing to do with wipers and could not have caused that. however, if someone really wants to bug you they will, so go to some honda dealer who knows you and who you mostly go to. they will accommodate you regardless.....