scheduled tasks failed following upgrade to 4.4.5

[ldgpangeo]

I've now upgraded three sites from civicrm 4.3.x to 4.4.5.  Two went fine with no complications.  The third went fine but no scheduled tasks work. 

They do not run from crontab and crontab reports no messages.
If I use a Unix shell command to run the same job, it completes with no errors but civicrm does nothing.
If I check the scheduled jobs web page, the needed jobs are all scheduled correctly.
    if I use "execute now" on that page, the job runs fine.
    I tried disabling the job and renabling the job -- it still does not run off the scheduler.
Manual inspection of the civicrm_job table shows each job properly configured and enabled.
I tried switching from cli.php to wget in the crontab job definition -- no change in above situation

Suggestions/recommendations on what to do to get the jobs running properly.

[Eileen]

We had this happen using drush. Adding -u=1 to the command fixed it ie

drush -u=1 cvapi job.execute

The problem was that without being resolved to a contact with 'view all contacts' permissions it was not sending civimails as the 'logged in contact' couldn't 'see' them. There is also an 'auth=0' param. I think it's no longer required but it doesn't get around the requirement for CiviCRM to think you are logged on as someone with permission to see all relevant contacts

[ldgpangeo]

Thanks,

I finally tracked it down by setting wget to verbose instead of quiet and testing from a second host.

Turns out I had to disable authenticating the ssl certificate.  Apparently when invoked from within the hosting service, the cert comes up as invalid while it's valid from the outside world.

Just one of those gottchas that never makes it into documentation since it's specific to certain hosting situations.