In Perl 5.8.8 a "perl -MP -e1" does not complain, however Perl 5.10 refuses (and rightly so in my opinion) to compile it.

Wait. 5.8.8 DWIM, and 5.10 regresses and doesn't, and you think 5.10 is right? I'd think it's wrong for 5.10 to break code that runs fine in 5.8.8. Perl already knows how to lose itself into infinite recursion:

$ cat A.pm
use B;
1;
$ cat B.pm
use A;
1;
$ perl -MA -we1
$
[download]

See, no infinite recursion here, so it's not that hard.

My question now is: Is there any systematic overview on which CPAN-modules may have a problem when running under 5.10?

No. See, if it were known, it would have been fixed by the time 5.10 came out.

Note you can prevent this from happening again. 5.10.1 will be here soon. TODAY is a good time to compile a snapshot of perl and test your code, and the CPAN modules you depend on, so you won't be caught off-guard by the time 5.10.1 hits the street.