ISSUE SUMMARY:

1º PROBLEM:
Attached an image of my photos module in jomsocial after upgrade to last 4 version today. Some blank spaces appears among photos.

Hi, Talia.

1. This issue is caused by... this photo particularly:

www.dindog.com/images/photos/746/52/thum...1339487420d65d57.jpg

All thumbs are 128x128... but this one is 128x127. That creates a 1px gap and next photos just hook up it. Also this photo is in portrait when the rest is in landscape... It seems it wasn't cropped properly... I'm guessing it's because photo proportions.

2. This issue is caused by your template. Top menu has z-index: 9999;
ROOT/templates/jm-joomads-ef4/css/template.147.css line 71:

.sticky-bar.scrolled #jm-bar {
    left: 0;
    padding-bottom: 12px;
    padding-top: 12px;
    position: fixed;
    right: auto;
    top: 0;
    width: 100%;
    z-index: 9999;
}