I am using the latest OS 2008 version, can't seem to install the OTR plugin for Pidgin (3.1.0-1nix3). It downloads fine from the apps catalog, progress bar goes up to 322K but when it completes the download I get this error:

Unable to download Pidgin "Off-the-record" Secure Messaging. Application package not found.
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I am a bit puzzled the package is indeed in the apps list, and it shows a download progress bar, contradicting the message. What is wrong ?