My QXC actually went with few incidents, unless you count getting lost at Gloucester while taxying and finding a message 'please call the tower' waiting for me when I got to Ops to book in... They still signed the form, though!
A colleague doing the same route 30 minutes ahead of me did get lost trying to find Tatenhill (he went past it - despite having the Tatenhill NDB tuned in!) but didn't fail, as he had the gumption to call D & D and admit to being lost. His instructor made him do extra solo cross-countries before putting him in for the test, though.
Tim