Hi Eric,
Thank you for inquiring. Please forgive, the problem occurs on old catalogs that have been created with Lightroom 1 or 2 and then upgraded when asked.
Yes, I do have to hunt for a file after reimport. The file can be found under the ALL PHOTOGRAPHS in the CATALOG section. If I click on it, the file can be processed in the DEVELOP module but the file will not show with the other files under the same KEYWORDS TAGS unless I shutdown Lightroom and restart it. The file will then be visible with the others under the same KEYWORDS TAGS grouping.
This weird behavior appeared in Lightroom 3. In Lightroom 2 no problems: same guy, same habits, same computer and same workflow.
My friend who buy anything new from Apple, has the same problem.
It's not to bothersome for one photo but it gets long when you are processing a hundred or more.
Thank you for your time and expertise
Andre