Many of you guys(as me) may have used Exception Notifier plugin to get Rails app exceptions right into your mailbox, and may also have faced some problem like this.
Also if you have 2-3 or more apps running in production then managing such exception mails is also a big headache. In such case one have [...]

Prototype helper method update_element_function is deprecated now, Please use RJS instead.

Following FormTagHelpers are deprecated and will be removed in Rails 1.2

start_form_tag (use form_tag instead)
end_form_tag (use </form> instead)

technorati tags:rails_deprications , rails, rubyonrails

These Finders are deprecated

find_first [use find(:first)]
find_all [use find(:all)]
find_on_conditions [use find(:conditions)]