I have used the code for my modal straight from the Bootstrap example, and have included only the bootstrap.js (and not bootstrap-modal.js). However, my modal is appearing u
This problem can often be experienced when using things like gradients in CSS for things like backgrounds or even accordion headers.
Unfortunately, modifying or overriding core Bootstrap CSS is undesirable, and can lead to unwanted side effects. The least intrusive approach is to add data-backdrop="false" but you may notice that the fade effect no longer works as expected.
After following recent releases of Bootstrap, version 3.3.5 seems to resolve this issue with no unwanted side effects.
Download: https://github.com/twbs/bootstrap/releases/download/v3.3.5/bootstrap-3.3.5-dist.zip
Be sure to include the CSS files and JavaScript files from 3.3.5.