I have noticed an issue in version 4.6. When I have a code replacement file loaded, the date field is changing based on the file. For example, the date field looks like this without a file loaded: Date: 2/25/09. When I have a day that matches a loaded file, I get a date like this: Date: 2,25-Brittney Kennedy,09. Here is the line in my replacement file that is matching: 25 ,25-Brittney Kennedy,.
It happens with CR2s and a DNGs from a 1D Mark IIN as well as JPGs from a 20D. This is on a MacBook Pro with OS 10.5.6 and the final release of 4.6.