The other day I tried upgrading my site via simplescripts in cPanel from 2.6.5 to 2.8.1. The upgrade reduced my site to a single line of php error (which I regret I was so appalled to see that I didn't write it down). Anyway, I de-installed the upgrade and its fine again. But now I don't know . . .
a) What I could have done wrong.
b) What to do now.
Any advice welcome.