If you have the CD, you can achieve (IMHO) a better outcome with less risk.
Insert the CD, and open Synaptic. In Settings > Repositories click the Additional Repositories button and enable CD-ROM (Installation Disc), then click Update the Cache.
In the main Synaptic window, search/find your suspect packages and 'Mark for Reinstallation' then Apply your settings. That will trigger the post-installation (setup) scripts for all re-installed packages as well as replacing the binaries.
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