The "Bus Error" means that likely something is wrong with the compiled parts of Perl. A most likely candidate is a mismatch between the Perl version and the version for which the extension DBD::mysql was compiled, or the version of DBD::mysql and the version of the MySQL client libraries against which the DBD was compiled. There is little we can do from afar - your best venue is to look at what (you) changed within the system and how you installed DBD::mysql into the 5.6.2 Perl.

A common, easy to detect pitfall would be if you copied the DBD::mysql driver for Perl 5.8.x to the directories for Perl 5.6.2 - that cannot work.

This might also have happened if you recompiled and reinstalled the driver and have shared extension directories between 5.8.x and 5.6.x.

Look at @INC for both Perls:

perl -v
perl -le 'print for @INC';
[download]