I just discover a surprising behavior of Safari on iOS (iOS4.2) When a text contains a division whose numerator is greater than 100 and denominator is greater than 1000, Safari converts it into a link. The link seems to be clickable, but if you do so, you get a warning message.

10/20
100/200
250/500
500/500
500/999
500/1000
1000/1000
1000/2000
50/1000
99/1000
100/1000
101/999
101/1000

I wonder why Safari is doing this and only on iOS (including the simulator).