Depends on how much of a drop you have and if you made any camber adjustments? Did you roll the fender lip - or you prefer not to do so? Also - what tires are you running and is it hitting fender with the top of the tread, or more on the sidewall?
OEM wheels with a PLUS+2 size (17" wheel) should be running a 205/45R17 or 205/50R17 - depending on the original tire size. If you go much wider than a 205mm width - you'll run the chance of rubbing. That 100mm difference could be what's causing you trouble. Have to watch the aspect ratio as well - too much and you'll run into speedo errors.
Tires also very quite a bit in physical width as well - you could measure two different 205/45R17 tires and find that the widths are different. I had to run Kuhmo ECSTA Supra 712s because the Yokohama AVS ES100 I was running before were actually a half inch wider at the tread - sectional width was about the same (couple tenths of an inch). Yokos rubbed but the Kuhmos didn't.
If you're running a 2" drop or more - you may have to adjust the camber to compensate. Going with a larger negative camber will help clear the fender lip at the cost of accelerated tire wear. You could have run up to a 45mm offset and it might have cleared (2003+ Corollas 35mm - 45mm offsets work) - but sometimes, wheels are available with that offset.
Checkout online resources like www.tirerack.com. They'll have all the specs of the tires so that you can see if the tire your running now is one of the wider ones.
Good Luck.