I just tried to correct the R
data.frame output formatting in a question. The markdown looked right: 4 spaces in for each line and a code block appeared. It all looked correct in the preview. However on the final site, both when it was at stats.stackexchange and now it's in overflow, the code lines are visually out of joint.
The question is here. Press 'edit' to see what it looks like in preview.
Is this just me, or is there a problem with the markdown plugin, or perhaps an awkward interaction with R's dollars and dots? Is there a work-around? It's the second time I've seen this in a few days.