For example, this answer contains
_not an answer_, or selecting _other_ but "not an answer" and "other" are rendered in italic and bold.
The same happens in other SE sites, as it is evident in this answer.
If it makes any difference, I am noticing this on my iPod running iOS 5.
This issue is similar to The mobile site is showing in bold words that should be shown in italics I reported in the past; the difference is that previously, words that should be in italic were shown in bold, while now they are shown in bold and italic. The other report has been marked as fixed, and it was really fixed, except that now the mobile theme doesn't (again) correctly render those words that should be just in italic.