Masonry causes layout problems under the following circumstances:
[x] Infinite Scroll. Sometimes there is to much space between the posts they are only positioned on the left side. This issue is only on big screens showing the two col layout.
[x] iFrames. Post formats show the whole content on blog or archive pages. I discovered that issue using a twitter embed in a non-standard post-format.
Masonry causes layout problems under the following circumstances: