I’ve added an admin function to TSL Profiles that fixes up people appearing as having joined SL in 1/1/1970. Here’s the output:

Accounts needing repair: 10

Repairing #120 (scott Zucker)... 2006-09-11          [OK]
Repairing #124 (Ezekiel Lach)... 2006-08-02          [OK]
Repairing #123 (Evan Beattie)... 2007-03-27          [OK]
Repairing #125 (Snipe Benford)... 2006-06-17         [OK]
Repairing #136 (Blue Backbite)... 2005-07-07         [OK]
Repairing #172 (Ysirian Marama)... 2006-09-21        [OK]
Repairing #186 (Roxi Katsu)... 2006-06-18            [OK]
Repairing #191 (Jonny Cardiff)... 2006-12-18         [OK]
Repairing #190 (Bazel Viking)... 2006-11-04          [OK]
Repairing #192 (Andy Korda)... 2007-01-14            [OK]

Finished. 10 succeeded, 0 failed.

Following this, I am reasonably confident that all TSLP accounts now contain accurate data. Yay.