sponateneous purging of a backscript?

[Cubist at aol.com]

sez ambassador at fourthworld.com
>Can you think of anything else that might be causing the backscript to
>be removed out from under only a very few users yet work fine for 
>everyone else?
   Isn't there an upper limit on how many backscripts can exist at any one 
time? If so, how does Rev keep track of the backscripts, and how does it decide 
which backscripts are "excess", and what does it do to "excess" backscripts? 
If not, well, I'm clueless...