Ran into a mildly perplexing problem while trying to install the mysql2 gem under Ubuntu 11.04 today. As will sometimes happen when Ruby gems require compilation of native binaries to run on your system, there is an unspoken dependency requirement of certain development libraries….

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After installing phusion and starting Apache, I received this error trying to access a Rails app under a vhost configuration:

Ruby on Rails framework version 2.2.2 seems to be corrupted. Please reinstall it.

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