Use version 0.8.7 of rake instead of the current 0.9.0 as the latter is known for causing trouble with rails.

Gemfile

@@ -3,6 +3,9 @@ source 'http://rubygems.org'
 
 gem 'rails', '3.0.7'
 
+# don't use version 0.9.0 for now as it's known for causing trouble /w rails
+gem 'rake', '0.8.7'
+
 # Bundle edge Rails instead:
 # gem 'rails', :git => 'git://github.com/rails/rails.git'
 

Gemfile.lock

@@ -97,3 +97,4 @@ DEPENDENCIES
   devise (= 1.2.1)
   mysql2 (= 0.2.7)
   rails (= 3.0.7)
+  rake (= 0.8.7)