My InChI Runneth Over 2
The only solution to this problem I've found is to set the CSS overflow property to "scroll":
InChI=1/C50H70O14/c1-25(24-51)14-28-17-37(52)50(8)41(54-28)19-33-34(61-50)18-32-29(55-33)10-9-12-46(4)42(58-32)23-49(7)40(62-46)21-39-47(5,64-49)13-11-30-44(60-39)26(2)15-31-36(56-30)22-48(6)38(57-31)20-35-45(63-48)27(3)16-43(53)59-35/h9-10,16,24,26,28-42,44-45,52H,1,11-15,17-23H2,2-8H3/b10-9-

If you're rendering the InChI in a dynamic page then you can insert elements at strategic points (e.g. slashes and dashes).
Pros: looks better to people and works with Cut&Paste Con: Robots will need to clean the InChI up first (by using e.g. XML valueOf).
Long systematic names have the same problem.
I filed a bug report on this in 2001.
https://bugzilla.mozilla.org/show_bug.cgi?id=95067
I am still hoping that it will be fixed eventually.