CONCORD. N.C. — Breakups are always complicated. You rarely
leave on equal terms. It seems one party initiates the split.
Irreconcilable differences, anyone?  That's how it went down
with Tony Stewart and Darian Grubb last season. Stewart told
Grubb, his crew chief of three years, just before the start of
the Sprint Cup 10-race Chase playoff format that he would have a
new crew chief in 2012. But then unexpectedly, something clicked
between them, and Stewart won five of the 10 races to capture
his third Sprint Cup title.  Oops. Was there a chance at a
reconciliation?  Not really. Stewart remained firm in his
decision, leaving Grubb a little perplexed. It was quite the
shock to the system for a lot of people other than Grubb because
the decision wasn't announced until the post-race news
conference following Stewart's championship-clinching victory in
the final race.  Awkward indeed.  "No matter what happens when
you are in a long-term relationship — you can ask your husband
or your wife — the communication lev