I'm sorry but I haven't bothered to ready any replies (Being lazy) but I have experienced this before with many cars (Normally after fitting coilovers or playing with alignment), I found it was always due to the TOE settings being out. Get it laser aligned, hope this helps!
After adding spacers or fitting coilovers (this is how I have witnessed this many times), it will throw the alignment out and this, what you're describing is normally due to the TOE not being central.
Do you have a PROTYRE near you? Or KWIK FIT will do it. (Both suck but they will do it)