Nothing up until now.
Having driven the ZX prior to the Xsara and had a few problems, was rather apprehensive but first impressions with just over 1,400 miles on the clock - I am very pleased with the improvements over the ZX.
I have a 1.4 LX I haven't serviced it even though its now on 26,000 and it is as reliable as any other car I have had. I think it is a lot of metal for the price.