strange behavior with ghci version 5.02.2

[Jorge Adriano]

> After loading a module with
>
> :l Module
>
> you can't use the Prelude functions unqualified, you just get things
> like
>
> <interactive>:1: Variable not in scope: `show'
>
> I am pretty sure that this worked some days ago, and I was using the
> same version then.
>
> I feel totally confused. Has this happened to anyone else?

Yes, for some modules it happens for others it doesn't. Kind of strange.
SuSE 7.3 rpms here, v. 5.02.2
J.A.