Yep - I had that one (in fact I think I've had every glitch going!).
My account stalled on 65 donuts, and wouldn't increase with each additional donut earned, found or bought. Good part was that it wouldn't decrease either, so I could buy everything that cost less than 65 donuts and they just reverted to 65 each time. In the end I bought everything I wanted and started hammering Homer Buddas for loads of fantastic freebies like tyre swings, then it fixed itself.
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