<p dir="auto">When you choose to customise bootstrap before downloading it from here:<br>
<a href="http://getbootstrap.com/customize/" rel="nofollow">http://getbootstrap.com/customize/</a></p>
<p dir="auto">The complied CSS for both bootstrap.css and bootstrap.min.css is WRONG.</p>
<p dir="auto">The CSS declaration for the .fade.in opacity is placed at the bottom on each CSS script, meaning when you open the Modal this element:</p>
<div dir="auto"></div>
<p dir="auto">Takes on this CSS :<br>
.fade.in {<br>
opacity: 1;<br>
}</p>
<p dir="auto">Instead of what it is supposed to be:</p>
<p dir="auto">.modal-backdrop.in {<br>
opacity: 0.5;<br>
filter: alpha(opacity=50);<br>
}</p>
<p dir="auto">This is because the .fade.in declaration is below the modal-backdrop CSS.</p>
<p dir="auto">With the normal bootstrap complied download (meaning non-customised version) is fine, and works as expected. Just not the custom one.</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/e3c6a8b48495dab698ef98cd325e86fb7827ea01cfb2ac11e0bd0955a3c8e418/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f353336393733392f313037303436322f63333739646232362d313435342d313165332d393339622d3430653061613736613764332e6a7067"><img src="https://camo.githubusercontent.com/e3c6a8b48495dab698ef98cd325e86fb7827ea01cfb2ac11e0bd0955a3c8e418/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f353336393733392f313037303436322f63333739646232362d313435342d313165332d393339622d3430653061613736613764332e6a7067" alt="screen-shot-2013-09-03-at-2 32 40-pm" data-canonical-src="https://f.cloud.github.com/assets/5369739/1070462/c379db26-1454-11e3-939b-40e0aa76a7d3.jpg" style="max-width: 100%;"></a></p>
<p dir="auto">Cheers,</p>
<p dir="auto">Alice.</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>