If you use PostgreSQL to back your Active Record models, you should check the current names for your tables and their sequences. Prior to Active Record 3.2.7, renaming a table did not rename the associated sequence for the table’s primary key.

A demonstration may be in order.

I had trouble today with my Windows %HOME% changing and throwing off Vagrant’s awareness of what boxes are installed. This may be your problem if Vagrant on Windows was working happily for you and then barks about no boxes. C:\Users\you> vagrant box list There are no installed boxes! Use `vagrant box add` to add some. C:\Users\you>dir /b .vagrant.d\boxes base-i-really-exist centos-does-too C:\Users\you>echo %HOME% <somewhere not C:\Users\you> C:\Users\you>set HOME=%USERPROFILE% C:\Users\you>vagrant box list base-i-really-exist centos-does-too %HOME% was different depending on whether I logged into Windows while on my Active Directory managed network or while I was offline.

T’was decided that the default behavior for Unity’s launcher will be to appear only on the primary monitor in Ubuntu 12.04. For some reason, when I upgraded to 12.04 (beta) today, my setting was for the launcher to appear on ALL desktops. Not a fan of it on all desktops. For those who want to change this setting, you’ll need to install the Compiz configuration manager. > sudo aptitude install compizconfig-settings-manager Once installed, run it.

Are you deploying your Ruby app to Red Hat or CentOS? Is Passenger complaining about not having permission to load the gems you have bundled with your app–e.g. failed to map segment from shared object: Permission denied–despite all the basic filesystem permissions looking correct? Would you like to avoid the nearly ubiquitous advice to disable SELinux, thus turning off the security that comes out of the box with SELinux enabled?