Help understanding the following error

[Boysenberry Payne]

I received the following error on my server and was trying to figure  
out how to correct it:

/usr/local/apache2/bin/httpd: relocation error:  
/usr/lib/perl5/site_perl/5.8.0/i386-linux-thread-multi/auto/APR/ 
Request/Apache2/Apache2.so: undefined symbol: apreq_handle_apache2

What does it mean?
How do I get rid of it?

Thanks,
Boysenberry

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