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   Here's another common problem which is trivially solved
   by Tie::File. How do I add a new record at the beginning
   of a file instead of at the end?

        unshift @lines, $new;   # Or add more than one record

####################
sub update_threads() {
...

} ## end sub update_threads()    
#***************************

main::get_date() called too early to check prototype at
 /usr/local/apache/cgi-bin/bthreads-perl line 50.
...
/usr/lib/perl5/5.6.1/Tie/File.pm line 699.
Use of uninitialized value in read at 
## and so on