For about two weeks now galleries I have had for years have been displaying incorrectly. When the images in the top row are narrow, images in lower rows overlap (Example: http://expandingcircleart.wordpress.com/ink/). This appears in both Internet Explorer 10.0 and Firefox 24.0, and when I use Ctrl-plus or -minus to resize the contents of the browser, thinking it is a browser image size issue, the problem gets worse and worse.
If I set my Firefox browser to a smaller image size than usual (by using Ctrl-minus) before I first load the page, it looks OK.
I do not see this in my other WordPress blogs (e.g. http://upstatenyplants.wordpress.com/), so perhaps it is a theme issue, a problem in the Parament theme.