I just used tire wear or wheel vibration as examples, but as Ard points out, any problem that can be attributed to the spacers technically can be an issue. A lot depends on your relationship with your dealer. Most dealers won't make an issue out of something that is not likely to have been a cause, but YMMV.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue