I just upgraded to version 2.6.13 and found that if I view a page’s source in Chrome, there’s no scroll bar. I can only see the first 30 or so lines of code. The scroll bar is there when viewing in standard mode (and it’s there for a millisecond after clicking the Source button, until the page fully renders). The problem isn’t present in Firefox.
I’m using Chrome Version 39.0.2171.71 and Firefox 33.0.2 with Windows 7.