Thanks for the fix, although it does not seem to fix things consistently for all users.
We cleared cache before testing.
Here are my current experiences (on MAC OS 10.11.3)
Firefox 46 – fixed, no jumpiness
Safari 9.0.3 – slight jumpiness occurs only in 3 column view and only the first and third columns jump: https://dwarddesigns.com/portfolio/fine-art/
Chrome 50.0 & Opera 36 – slight jumpiness occurs only in 3 column view and only the second (middle) column jumps: https://dwarddesigns.com/portfolio/fine-art/
This is what my client experiences:
Chrome: subtle jumping happening on portfolio pages with grid set to 3-columns
Firefox: major jumping on all portfolio pages with grids set to any number of columns.
Safari, no hover/jumping issues!
Weird, huh?