The only bug I recall being reported on BO was in the built in HTTP server (which I wrote from scratch in C), if you shared a specific directory with the HTTP server, on Internet Explorer it would not let you click through to sub-directories because of a missing slash at the end I think. I only ever tested it with Firefox which seemed to not care if the slash was present. I found out about this from people who thought it was a feature, and were horrified to find out that anyone COULD access those sub-directories if they manually added the trailing slash or used a different browser.

.ooM.ooF.