The problem area is the cycle lane on the East (South-going) edge of Clarence Street just South of Dilworth Street. This is part of the main road surface, not on the pavement.
The road was repaired some time in 2011, and the patch is about as smooth as corrugated iron. Cyclist tend to avoid it, causing clashes with motorists.
Please send the incompetents who did the repair job back to fix it, in their own time at their own expense!