Some additional testing shows that if I select the first 8 tag files, everything works fine. If I then take the next 8 tag files, it works too.
I had 22 tag files so if I took them in batches of 8, 8, and then 6, everything worked.
Counter limit somewhere?
Looking back, I don't think I had a situation where I tried to load a selection consisting of more than 8 files. I group the tag files by event so this past weekend was the first time I went over 8 tag files at the same time for the same event.
G'luck. Let me know if you find something that will be fixed in the final release of 4.5.2 or a later version so I know whether to keep taking them in batches of 8 or to dump the whole set of tag files in at once.
Thanks.
-Mike