None.
My first brand new car. As you see, I haven't owned it for long, but I am very happy with the car. It feels solidly built and has 4 airbags, ABS etc. so should be safe enough.
I have driven the old model Fabia, but this model feels like a big improvement. It feels more modern, handles well and looks similar to the mini or Suzuki Swift.
2000 mile update: The car's run in now and feels really quick, much more so than the figures suggest. (50 mph in 7-8 seconds, 60 in 10-11!) At the moment the car is back in the garage, a small piece of trim between the bottom of the nearside A-pillar and the front wing is loose. Everything else is fine though and I'm really pleased with the car.