try reinstalling rake instead…
Using a shared gemset between two projects may be a bad idea, not sure. After installing vhochstein’s Rails3 branch of ActiveScaffold in the second project (tho not sure that was the key factor), I started getting this error on running rake db:migrate:
“no such file to load — net/https. Try running apt-get install libopenssl-ruby”
Tried many of the suggestions at http://www.ruby-forum.com/topic/90083 without help…finally, decided it was rake at fault, just ran
gem install rake
(even though it was already installed), and the error went away…