User profile settings sometimes corrupted on Drupal 5.x to Drupal 6.x upgrade [#886122]

Reporting this issue in the hopes that enough information will accumulate to positively identify a bug. This has happened on one site of two that we recently upgraded from D5 to D6. Unfortunately, I can't provide a definite path to reproduce the problem.

We will have more D5-D6 upgrades during the fall. If I find information that can help to reproduce this issue, I'll add it to this report.

Symptoms

Subsequent to a D5 to D6 upgrade (and corresponding IMCE upgrade from 5.x-1.3 to 6.x-2.0-rc1), all IMCE user profile roles contain incorrect data. The settings after the upgrade were as follows:

Permitted file extensions	665x720
Maximum image resolution	1
Maximum number of files per operation

The values should have been (and prior to the upgrade were):

Permitted file extensions	gif png jpg jpeg txt doc pdf tif psd xls ppt mp3 mp4 wav odt odp ods docx pptx xlsx
Maximum image resolution	665x720
Maximum number of files per operation	1

As you can see, the field values are correct, but assigned to the wrong fields! As I mentioned above, this has happened only on one site of two we've recently upgraded, but it's not unlike this reported bug: User number settings scrambled after upgrade from Drupal 5.x to Drupal 6.

-- b