Using Schwalbe Marathon tyres, they are normally excellent.
I didn't get the same feeling on any other recumbents in the past so I am wondering if I am just having a bad few days in my own head. I had been using the recumbent trike for a while recently and the change back may be causing me to freak a bit.
The bike is a HP Velotechnik Streetmachine GT and it is the best of all recumbents I've had and I know it is sooooo well engineered that there are no design faults now.