subprocess post-installation script returned error exit status 10

[OOzy Pal]

Hello All,

Because I want to install PHP4 with Apache1, I changed my sources.list
to Dapper. Then I installed PHP4 and Apache1. After than, I returned
the sources.list back to Hardy. Everything works ok but I am getting
the following error after each update or new program installation.

E: apache: subprocess post-installation script returned error exit status 10

-- 
OOzy
Ubuntu-Gutsy (7.10)