pro_drop4_0b.gif vs pro_drop4_0b.JPG // pro_drop4_0a.gif vs pro_drop4_0a.JPG

I downloaded Amor_Azul-6.x-1.x-dev.tar.gz some days ago and installed it on Drupal 6.

Problem: I didn't see the primary links because the blue Tabs didn't show up.

Investigating the CSS showed, that pro_drop4_0a.gif and pro_drop4_0b.gif were downloaded, but the CSS references jpegs instead
ul#navlist li {
display:block;
float:left;
margin-right:4px;
background:url(images/pro_drop4_0b.jpg) right top;
padding:0px;
}
ul#navlist li a {
display:block;
float:left;
height:29px;
line-height:29px;
color:#fff;
text-decoration:none;
font-size:12px;
font-weight:bold;
padding:0 6px 0 6px;
cursor:pointer;
background: url(images/pro_drop4_0a.jpg) no-repeat;
}