I just attempted to upgrade to release 7273 and update.php fails to run. It gives no output (just return code 255), and logs nothing to update-errors.log or any other log file.
My php skills are pretty weak, but a bit of "got here" debugging lead me through the following.
includes/update/update.php
21: include_once("includes/definitions.inc.php"); #bailed on this line
includes/definitions.inc.php
513: $rev_old = @get_obs_attrib('current_rev'); #bailed on this line
I wasn't able to track it down any further than that because I couldn't even seem to get get_obs_attrib to execute.
As a last ditch effort, I also tried commenting out all of my config except the absolutely required pieces, but it still failed in the same way.
Is anyone else having this problem or have any ideas?