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I found 14, but that might be because of whether you count something as a single error or two separate errors. The 13th thing was a little bit ambiguous due to lack of info about where the connector was going, or maybe because I don't trust internal pull-ups.
Here is the schematic with the 36 potential problems... dots indicate nodes that are not connected in the schematic or wrong connections. Lines indicate a wrong component ... i.e wrong kind of MOSFET, backwards MOSFET, wrong schematic symbol, wrong diode direction, resistor value too low (EEPROM)
Yeah I think you found the oscillator issue though I don't entirely agree.
I thought it looked funny the first time I saw it but am not good with oscillators. I think C32 and C33 shouldn't be there. I think C28 AND C29 are required though. I also think the oscillator itself is completley wrong too...pins 1 and 3 should be going to the MCU. But maybe there is more than one way to wire an crystal to an MCU. I wouldn't know.
C28 and C29 are required but they are too small .... 18pF is typical, however look at the datasheet on that oscillator part, it might have the proper caps built in. (Don't know didn't look myself). If so, then he wouldn't need any caps there. The two pins on the oscillator I have dots on should be swapped. C32 and C33 should be removed. It is nit picky I know, but there are several nodes left unconnected... if left to an auto router, the connections would not be made. That is the main significance there.