Unfortunately, we realized some Librarian's Dream themes didn't respect this policy so we removed this setting from them. When this fix goes live it may change the font size of some elements on your journal. If you'd like to go back to the previous setting, simply go to http://www.dreamwidth.org/customize/opt
Here's the list of themes concerned by this change:
Battle Raven (10pt instead of 10.5pt)
Deep Forest (also 10pt instead of 10.5pt)
Remember that this is only if this is a theme for Librarian's Dream. Some themes using the same colors have the same name but are for different styles (the Style credit module will tell you which style and theme you're using). Neither these nor other Librarian's Dream themes are concerned by this change.