drupal amazon_store error

warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, '' was given in /www/public/includes/form.inc on line 372.

warning: array_shift() [function.array-shift]: The argument should be an array in /www/public/sites/all/modules/amazon_store/amazon_store.module on line 1602.

Seems to be cached. Disabling cache fixed this but apparently the cart is cached for anonymous users so anything you add goes to an empty cart. Gave up on this as a patch for this did not fix my issue in addition to the fact it requires some theming.

P.S
warning: Missing argument 1 for _system_themes_access()

was the effect of upgrading the amazon_store to 2.x-dev without running cron afterwards.

Drupal Cron run failed

Very interesting situation. I love drupal (not sure why) even though if you add even a few modules the load time becomes snail pace. Also any sort of shared hosting environment and it can break down with database connect issues so it's a pain. Forget about getting even a dozen logged on users on a shared environment because depending on the modules... you will get booted out of your hosting provider. Enough complaining; done. Reason for this post is for my recent problem. I tried to run cron and it says:

Cron failed.

I tried to run it again and log says:

Attempting to re-run cron while it is already running.

Oh really? I'll wait a while and a few hours later I try again and get this message:

Cron has been running for more than an hour and is most likely stuck.

Well the server seems fine... not high load so I internet searched and the solution appears to be to disable the update status module. I ran cron successfully. I re-enabled update status module and ran cron again. Successful. Great. Problem solved. At least for Drupal 5.19

For Drupal 6.13 you will have to modify /modules/common.inc.
Look for Line 2637 and change $semaphore = variable_get('cron_semaphore', FALSE); to $semaphore = FALSE;

Remember to run cron and with success; revert the change.