(This is a maintenance report for the benefit of the people who keep the trail clean, don't be put off - it's still a great ride! ) 
Sussex St   - tyres dumped, general litter. 
Bowden Housteads woods - general litter & fly-tipping between Parkway bridge & Mosbrough Parkway Bridge. Signage missing - have put up temporary signs but a more robust solution is needed here. The new signs that have been put up in the city centre are not suitable for these remote locations - the one new one that has been put up, at the NCN6/67 junction at Richmond has been vandalised. 
Glass on track at numerous locations between Mosbrough Parkway & Manor Way  - Access points in particular need to receive attention. 
Off-road motorcyclists in the Carbrook Ravine Sheffield Wildlife Trust site.
Fly-tipping on Tinsley Park Road - general litter all the way from Arena to Tinsley Park Rd
Unnecessary "cyclists dismount" sign at south end of cobweb bridge. 
Glass on pavement - East Coast Rd bridge. 
Beighton Tip Site - The new tracks across the landfill site are in much better condition than the old TPT route and a more pleasant ride. However, there are no signs across the site and nowhere to put temporary ones. 
Rear of Sovereign Stainless Fabrications, Attercliffe Rd- fence broken leading to rubbish spilling out on to Five Weirs Walk.  
Broken glass on pavements around Arena Sq
NCN6 Old Penistone Rd Grime & litter at access point returning to shared use pavement, south end. 
Litter bins need to be emptied more often - many of the bins I passed were full to overflowing. 
On the plus side, the new sufaces between Beighton and  Richmond are excellent and make for a safer, faster and smoother ride. 
Elsewhere in the city
Cycle route signs pointing in wrong direction at following locations:-
Glossop Rd/Brunswick St junction. 
Saxon Rd/Chesterfield Rd junction (w. side of railway bridge)
Fly-tipping at Eastern end of Stone Lane. 
Fly-tipping & broken glass on the footpath between Bamforth St & Penistone Rd (nr Vision windows Warehouse)
Barnsley. 
TPT signs have been vandalised on town link  - visible from the train.