This is really pretty old. There is a 25 year old BSD bug.
it’s filed as rdar://problem/5923005 for the special Apple crowd with access to Radar reports.
The technical description of this bug is here.
There is also a 33 year old UNIX bug. It’s a buffer overflow bug. It’s technical description is here. As far as I know, there is no Radar report. But I wouldn’t know.
Due to some stupid error, now I can’t use /index.php/year/month/day/post-name URLs. WordPress just gives me it’s internal 404.
I am working on this bug and hope to have it fixed by the end of the day.
UPDATE: I had to go to 2.6-beta1 from my Time Machine Backup. Now we can use those kinds of URLs again.
I hope that this brings attention to WordPress developers, so they can fix this problem.
After much research, this bug also would affect us if we used /year/month/day/post-name.