Error 500 when downloading updates for modules Recently I've transferred several Drupal sites to DigitalOcean.com VPS server (Ubuntu).
Almost all work well.

But when I try to downloading updates for modules I get error:

An AJAX HTTP error occurred. HTTP Result Code: 500 Debugging information follows. Path: /batch?render=overlay&amp;id=82&amp;op=do StatusText: Internal Server Error ResponseText


I see the error for every Drupal sites at VPS.
I can successfully update modules by drush.
But I want to understand the problem.

There is no error record at error.log (Apache)
And there is following line at access.log:

POST /batch?render=overlay&amp;id=83&amp;op=do HTTP/1.1" 500


How can I solve the problem?

UPDATE:
It seems the problem in PHP.
There is known bug with gzopen() for Ubuntu32.
It was PHP bug with Ubuntu 32bit.

I've solved the problem after installation of newer PHP version