I had a strange problem installing the new Pandora One desktop player under Ubuntu Linux. I had previously installed the beta Pandora desktop player, and the Adobe AIR app installer complained that it couldn’t install the new client over the old one.
I couldn’t find a clean way to uninstall the old one, so I just removed it from /opt/Pandora manually. When I tried to install the new player, the installation failed as follows:
I did some digging and discovered that it’s possible to capture installer logs per Adobe’s knowledge base article “Logging Adobe AIR 1.5 application and runtime installations.” It turns out that the AIR installer for Linux (or at least Debian-derived distributions like Ubuntu) uses dpkg to install AIR packages. Here’s the line that tipped me off:
subinstaller: Error occurred; beginning rollback: [ErrorEvent type="error" bubbles=false cancelable=false eventPhase=2 text=" error: dpkg: error processing /tmp/FlashTmp.mdgH0a/setup.deb (--install):
received unknown message type from subinstaller:
received unknown message type from subinstaller: trying to overwrite/opt/Pandora/bin/Pandora’, which is also in package com.pandora.pandora.fb9956fd96e03239939108614098ad95535ee674.1`
When I removed the Pandora directory by hand, there was still an entry in the dpkg database, as shown here:
$ dpkg -l | grep -i pandora
ii com.pandora.pandora.fb9956fd96e03239939108614098ad95535ee674.1
I removed the package (sudo apt-get remove com.pandora.pandora.fb9956fd96e03239939108614098ad95535ee674.1) and everything worked great.
I realize this is even less interesting to most of you than usual, but Pandora doesn’t officially support Linux, so I want to make sure that this gets written down somewhere in case somebody else has the same problem.

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