Yes, explicitly working around the quota system would be considered abuse. Simply shipping an application that makes requests against both V1.x and V2.0 isn't, though I wouldn't encourage it (outside of the narrow case of moving an existing V1.x app onto V2.0 over multiple releases).
Also, remember that V1.x's days are numbered. Once we're confident in 2....
I get a similar but different problem: when polling http://stackauth.com/1.1/sites?page=2, I get the regular icon for Electronics.SE and Electronics.SE Meta.
...are identical and probably shouldn't be.