After migrating from Media Temple DV 3.5 to Media Temple DV 4.0, I found my email box filling up with notices of cron errors. Sometimes, the error was “-: wget: command not found” or other times “-: php: command not found”. Commands worked perfectly fine if run in SSH but not through the Plesk Cron Tab (Scheduled Tasks). Initially, calls to the normally superb Media Temple Support resulted in several unsatisfactory replies such as “crons should work just fine on Plesk 10” or “we really don’t support crons”. I tried everything. Believe me, several weeks living without crons was not fun. Databases didn’t get backed up, emails didn’t go out, cleanup scripts didn’t run, etc. Then finally, a senior support engineer at Media Temple put me on the right track by mentioning that the user (i.e., the service) requires shell access to run crons in Plesk 10.