Ken Williams <kenahoo@gmail.com> writes:I'm grasping at straws here, having seldom exported to HTML, but have you loaded the languages for babel?
Unfortunately, downgrading to 7.8.11 didn't change the behavior - all code sections are still exported to HTML as class "example".
I also see that on one machine, using 7.9.2, I get the desired <pre class="src src-R"> tag for R code export. I can't figure out what's making the difference though.