Steps to reproduce:
* go to http://blue-dragon.wmflabs.org/wiki/Campaign:show-off-campaignss://www.mediawiki.org/wiki/Help:Images#Rendering_a_gallery_of_images, scroll down a bit to the 'packed' gallery example
* watch the gallery layout make clean, justified margins
* resize the window horizontally (up or down)
* watch the gallery items reflow, but not resize -- now you have ragged margins
Oh nooooooooo!
Probably needs some JS code to hook window.on 'resizee' event and adjust packed galleries if horizontal size changes.
[This was seen on Yuvi's new UploadWizard campaign pages, but we think it's a general issue with the packed gallery.]
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**Version**: 1.22.0
**Severity**: normal
**URL**: http://blue-dragon.wmflabs.org/wiki/Campaign:show-off-campaigns