Internal Server Error

rubyonrails-talk
1

I often get a web page when ever I try localhost:3000 with the following message:

Internal Server Error private method `gsub!' called for #<Class:0xb6d5d764> WEBrick/1.3.1 (Ruby/1.8.7/2010-01-10) at localhost:3000

I get this thing after I upgraded to Ubuntu 10.04, is some one facing this same problem. Is there any fix for this?

Thanks in advance.