Twitter Bootstrap 2 has a bug while on modal dialogs. The page does not scroll as expected. So, if the browser window is not wide/tall enough to display the whole modal dialog content, the scroll bars do not make it appear.
The bug is described here:
And the answer is given a little bit below that:
This problem does not occur with jQuery modals neither with Twitter Bootstrap 3.
I am using Ruby on Rails and the less-rails-bootstrap gem.
In order to fix the problem for my current application, and instead of moving to Twitter Bootstrap 3 or to jQuery, I have decided to fix the problem in the gem
Here is the fix:
gem 'less-rails-bootstrap', :git => 'https://github.com/pmatsinopoulos/less-rails-bootstrap.git', :branch => 'bug-fix-modal-scrolling'
Important Note This bug influences your capybara/selenium tests, because elements that are normally visible, while the browser is maximized, they cannot be located by selenium and they are reported as non-visible and cannot be interacted with, if the window browser is not open enough to display the whole modal dialog.