Errors after upgrade to Craft 2.5 I'm having a few irregular errors after upgrading via the automatic update. When trying to visit the dashboard I get:

Internal Server Error
Passed variable is not an array or object, using empty array instead

My max_execution_time and memory_limit are set pretty high, and I believe the upgrade completed successfully. But I cannot view the dashboard or settings pages. Everything else seems to be fine.
Do I have to fully revert and re-try the upgrade via the manual method?
To answer my own question: There may be some plugin incompatibilities when upgrading to Craft 2.5. This is to be expected, given all the variables. In my case the Placid plugin was not yet compatible, as seen when I put Craft into devMode.

So either:


Wait on the upgrade until your plugins are current, or 
Disable lagging plugins as necessary if you need the bleeding edge.