<p dir="auto">In the resulting output of customized Bootstrap 3 CSS, the styles for .fade.in come after .modal-backdrop.in</p>
<p dir="auto">This causes the opacity of the modal backdrop to become 1.0 instead of 0.5, giving the appearance of a totally black backdrop instead of a faded page.</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/7b7682122e03da7b4649cf867106324d8ac1c3be8cb1ec43683b8f617a28cc85/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f333732303032322f313134303630382f34306536386434382d316361322d313165332d393932652d3562386666613632353030382e706e67"><img src="https://camo.githubusercontent.com/7b7682122e03da7b4649cf867106324d8ac1c3be8cb1ec43683b8f617a28cc85/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f333732303032322f313134303630382f34306536386434382d316361322d313165332d393932652d3562386666613632353030382e706e67" alt="bad modal backdrop" data-canonical-src="https://f.cloud.github.com/assets/3720022/1140608/40e68d48-1ca2-11e3-992e-5b8ffa625008.png" style="max-width: 100%;"></a><br>
<a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/19e142a0a1e709e70b092ea3500d6c7bc5f08ae172eea7dc065cf66913591824/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f333732303032322f313134303630392f34306538316530362d316361322d313165332d383137612d3365383831633632336361362e706e67"><img src="https://camo.githubusercontent.com/19e142a0a1e709e70b092ea3500d6c7bc5f08ae172eea7dc065cf66913591824/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f333732303032322f313134303630392f34306538316530362d316361322d313165332d383137612d3365383831633632336361362e706e67" alt="good modal backdrop" data-canonical-src="https://f.cloud.github.com/assets/3720022/1140609/40e81e06-1ca2-11e3-817a-3e881c623ca6.png" style="max-width: 100%;"></a></p>
<p dir="auto">Hi!</p>
<p dir="auto">I just generated a customized version and the modal background is totally black (I also generated a version without any change to be sure it wasn't me that caused that):</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/7c884cd09470c8345f0304ad6c0a9768a9b9ad1b1cf415c28d5eb6df1beb82ab/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f353238373238352f313030393333382f66653335323434612d306233362d313165332d393531332d3962363637663362646665652e706e67"><img src="https://camo.githubusercontent.com/7c884cd09470c8345f0304ad6c0a9768a9b9ad1b1cf415c28d5eb6df1beb82ab/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f353238373238352f313030393333382f66653335323434612d306233362d313165332d393531332d3962363637663362646665652e706e67" alt="image" data-canonical-src="https://f.cloud.github.com/assets/5287285/1009338/fe35244a-0b36-11e3-9513-9b667f3bdfee.png" style="max-width: 100%;"></a></p>
<p dir="auto">The download link on the home page does have transparency:</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/c35f738d5bc9c495c9e5c3e792a7c2a713e064f7ba536da495ecd6830f696e96/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f353238373238352f313030393335332f33396635313138342d306233372d313165332d383231622d3263396365363830626339352e706e67"><img src="https://camo.githubusercontent.com/c35f738d5bc9c495c9e5c3e792a7c2a713e064f7ba536da495ecd6830f696e96/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f353238373238352f313030393335332f33396635313138342d306233372d313165332d383231622d3263396365363830626339352e706e67" alt="image" data-canonical-src="https://f.cloud.github.com/assets/5287285/1009353/39f51184-0b37-11e3-821b-2c9ce680bc95.png" style="max-width: 100%;"></a></p>