Description of problem:
[tasaka1@localhost ~]$ rpm -q perl
perl-5.10.0-49.fc10.i386

[tasaka1@localhost ~]$ perl -w -e 'use Fcntl ":mode" ; use POSIX'
Constant subroutine main::S_IXOTH redefined at -e line 1
Subroutine main::S_ISCHR redefined at -e line 1
Constant subroutine main::S_IRWXO redefined at -e line 1
Constant subroutine main::S_IRUSR redefined at -e line 1
Subroutine main::S_ISBLK redefined at -e line 1
Constant subroutine main::S_IWOTH redefined at -e line 1
Constant subroutine main::S_IWGRP redefined at -e line 1
Constant subroutine main::S_IRWXG redefined at -e line 1
Constant subroutine main::S_IXGRP redefined at -e line 1
Constant subroutine main::S_IRGRP redefined at -e line 1
Constant subroutine main::S_IXUSR redefined at -e line 1
Subroutine main::S_ISREG redefined at -e line 1
Subroutine main::S_ISDIR redefined at -e line 1
Subroutine main::S_ISFIFO redefined at -e line 1
Constant subroutine main::S_ISUID redefined at -e line 1
Constant subroutine main::S_IWUSR redefined at -e line 1
Constant subroutine main::S_IROTH redefined at -e line 1
Constant subroutine main::S_IRWXU redefined at -e line 1
Constant subroutine main::S_ISGID redefined at -e line 1

This causes many warning when using webcollage (in 
xscreensaver-extras-5.07-3.fc10). I don't know how serious
these warnings are.

Version-Release number of selected component (if applicable):
perl-5.10.0-49.fc10

How reproducible:
100%

Steps to Reproduce:
1. See above
2.
3.
  
Additional info:
Some googling shows that this seems fixed in perl 5.11.0