To upgrade, follow a four step process. Step 1: edit the file
/sw/etc/fink.conf, adding a line to it which reads NoAutoIndex: true
(You may need to use sudo to obtain the correct permissions to edit
this file.) Step 2: run the command fink reinstall fink in order to
tell fink that you are now on 10.6. (If you encounter a message about
package database corruption, run fink index -f and try this step
again.) Step 3: run the command fink update fink to get the latest
fink for 10.6. Step 4: run the command fink install perl588-core to
replace the version of perl which Apple changed during the OS X
upgrade, in case you have fink packages which depend on it.
After the upgrade, you may wish to run fink configure to do some cleanup.