Last modified: 2013-08-22 14:54:22 UTC
In past, when page has been saved starting and/or ending with whitespace, they have been trimmed. This behavior is no longer. That causes incorrect rendering (empty paragraphs) in cases like the one described here: https://commons.wikimedia.org/w/index.php?diff=80945430 . Bug 34957 and bug 17988 may be related (they are both about (not) trimming the whitespaces).
Undoubtedly there is only one recent change that could cause a regression like this.
Fixed in I75eb1c4b
Fix merged.
Closed older resolved bugs as verified.