Shrewsbury goalkeeper Chris Weale fouled JP McGovern in the area on 68 minutes and Miller put United back on terms.
The game ended 2-2 but there was worse news for Carlisle with winger Matty Robson limping out of the game after only nine minutes with a suspected back problem
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There are three flood warnings and 16 flood alerts currently in place across the county.
A 41 tonne crane closed the A7 for most of today after leaving the road and becoming trapped in the road barrier.
After a wet and windy day things turn colder from tomorrow.