Interesting! I haven't read them in detail, but here are some convenience links to the Usenet comp.risks posts for the month of January, 2000:
https://groups.google.com/g/comp.risks/c/7AGzwqmZtH8
https://groups.google.com/g/comp.risks/c/FxfN8n_SM94
https://groups.google.com/g/comp.risks/c/stnCYfGCbMg
https://groups.google.com/g/comp.risks/c/r8G40aVTF-Y
@tychotithonus
Briefly, from memory, there were *quite a few* problems of small retail establishments resending duplicate charges due to bugs in their software that treated "year 00" as something that could never happen. This would have been avoided by updating their software. And they were informed. Problems were averted by banks detecting and rejecting the duplicates.
Also, we lost track of one of our spy satellites for a few weeks.
Read the comp.risks entries for details.