The fluid/responsive implementation of Isotope seems to have some re-position issues in Firefox, please check:
With either Firefox 9.0 or 10.0.
You will experience gabs between the elements in certain screen sizes.
Right you are. Thanks for bringing this to my attention. Labeling as bug.
Line910 in Method _masonryLayout:
colSpan = Math.ceil( $this.outerWidth(true) / props.columnWidth );
colSpan = Math.round( $this.outerWidth(true) / props.columnWidth );
Seems to fix the issue.
I have the same problem with Firefox only with issue #171 (with a test video included)
Did this ever got solved?
I remember trying your fix @flexmotion ... It wasn't working for me. Did it worked for you @Geesus08 ?
Closing as a duplicate of #222
Also see my response in #271