On my mind, due to some careful checking of results prior to submissions. Nothing substantive changed, but the numbers have to be right.
Correction
Data Errors in Results Section
JAMA. 2015;314(1):86 doi:10.1001/jama.2015.6076
Data Errors in Table 2
JAMA. 2015;314(1):86 doi:10.1001/jama.2015.6072
Data Errors in Table 3 and in Text
JAMA. 2015;314(1):86 doi:10.1001/jama.2015.6074
Incorrect Data in Table 4
JAMA. 2015;314(1):86 doi:10.1001/jama.2015.5464
Healthy Algorithms 
Sometimes there are substantive changes…
JAMA. 2015;313(24):2497. doi:10.1001/jama.2015.6026
And they don’t make it easy to see the values before and after correction!