1px gap using Isotope Masonry (or Packery) expecialy on Safari - jquery-masonry

Question

i'm sorry for my english.
It's many days that i try to figure out an issue that i see trying to create a responsive fullwidth grid of images. To create this grid I'm using Isotope with Masonry Layout (http://isotope.metafizzy.co/) or Packery (http://packery.metafizzy.co/layout.html). I have tried both and in both i have the same issue. For some resolution of my browser i see a 1px gap between images (as you can see in the images below).
I have read about this problem in many post (for example https://github.com/metafizzy/packery/issues/42) but no solution works for me. Anyone can help me?
At the moment my code is:
jQuery(window).load(function() {
var container = document.querySelector('.grid');
var pckry;
// using imagesLoaded http://desandro.github.io/imagesloaded
imagesLoaded( container, function() {
pckry = new Packery( container, {
itemSelector: '.grid-item',
rowHeight: '.grid-sizer',
percentPosition: true
});
});
});
I attach the final grid that i would like to have:

Answer 1

After many days of work i have been able to solve my issue thanks to DeSando, the plugins's author.
As he explain in this post http://metafizzy.co/blog/beyonce-seamless-fluid-image-masonry/ the gaps occur due to pixel rounding differences between JavaScript and CSS.
In my case i have a grid based on four columns and when the width of the browser wasn't divisible per 4 the gaps were born. So, as DeSandro suggests here, a workaround is to set container of images a little bit more smaller and cover the gaps with images a little bit more bigger. So, in my website:
HTML
<div class="grid">
<div class="grid-item" ><img src="..." title="" class="lazy"></div>
<div class="grid-item grid-item--width2 " ><img src="..." title="" class="lazy"></div>
<div class="grid-item grid-item--width2 "><img src="..." title="" class="lazy"></div>
<div class="grid-item" ><img src="..." title="" class="lazy"></div>
<div class="grid-item" ><img src="..." title="" class="lazy"></div>
...
</div>
CSS
.grid {
margin: 0 auto;
width: 100.4%;
margin-bottom: 0px !important;
}
.grid-sizer,.grid-item {
width: 24.9%;
display: block;
float: left;
margin: 0;
padding: 0;
border: 0;
font-size: 100%;
font: inherit;
vertical-align: baseline;
list-style: none!important;
}
/* 2 columns wide */
.grid-item--width2 {
width: 49.8%;
display: block;
float: left;
}
.grid-item img{
display:block;
width: 100.4%;
max-width: 100.4% !important;
}
JS
// init Packery
var grid = jQuery('.grid').packery({
itemSelector: '.grid-item',
percentPosition: true
});
// layout Packery after each image loads
grid.imagesLoaded().progress( function() {
grid.packery();
});
I'm sorry for my english. I hope this could be useful for many of us.