Disable Acrobat plugin in browser

At work I recently had to disable the Acrobat plugin in IE in order to have the same environment as the customer who reported a bug in our software that wasn’t reproducible on my system.
Since I didn’t want to *uninstall* but only temporarily *disable* the plugin I started digging in IE’s Internet Options. There I found a few promising Adobe entries in Programs -> Content that I disabled. Unfortunately, neither a browser restart nor logout/login showed any effect.
The solution is to open the Adobe Acrobat Reader separately as an individual application. Then go to Edit -> Options -> Internet (or Preferences -> Internet on a Mac) and uncheck the “Display PDF in browser” flag.

Trash folder in Apple mail disappeared

Somehow the trash folder for the IMAP account in my Apple mail application had disappeared. As always I suspected that I must have fiddled with the configuration not realizing what I was doing. And – as in most such cases – I was right.
Go to Preferences -> Accounts -> select the account in question -> Mailbox Behaviors. You’ll find the settings for your trash folder there.