Hi Jim,
I echo previous poster's comments- I've used your utility for years and just love it. Thank you so much for making it available.
My issue is the same or very similar to those above and I hope to pick up where they left off in providing you the feedback necessary to look into the issue if possible. I have a batch of about 1000 photos. I believe at one time they were displaying the correct Date Taken, but now are not. Note I have NOT switched BRU versions- the tag was being displayed properly in 2.7.1.1 and now is not in 2.7.1.1. Windows Explorer (Vista) displays all Date Taken values properly.
I may have noticed a pattern. The first thing I did with my batch of pictures was adjust the Date Taken field in all image by 7 hours using jhead.exe. I believe after that point the Date Taken displayed properly in BRU. The next thing I did was go through and manually ROTATE all images that needed it. I used the "Rotate Clockwise" feature of Windows Photo Gallery in Vista, 32-bit. I've now noticed that only (and all) of the pictures that I manually rotated show an incorrect Date Taken in the "Date Taken (Original)" column in BRU.
By experimenting with the different values in the Append Date function, I have determined that the date being displayed in the Date Taken (Original) column is either: Accessed (Current), Taken (Modified) or Taken (Recent).
I don't think it's Modified (Current) because sometimes it's identical to what's being shown in Date Taken, and sometimes it is off by 1 second.
One last important note: If I manipulate the "Append Date" function to rename the file using "Taken (Original)" or "Taken (Digitized)" EXIF data, the proposed new filename shows the correct Date Taken. So it seems the information is there, but perhaps it's being pulled from the wrong place when it comes to showing the value in the Date Taken (Original) column. I'd be happy to provide samples if helpful. Sorry this got so wordy

Any help you could provide would be greatly appreciated. Thanks again!
Darrin