I’ve noticed that whenever I use the WordPress App on my iPhone or iPad to edit a technical post that includes some code, the snippet I’ve carefully slaved over gets mangled. In particular, anything that uses templates in C++ (or generics in F#) will be affected, for example
vector<int> myData;
becomes
vector; myData;
The only answer at the moment is to be disciplined and restrict myself to editing code-based posts in the Web editor, which doesn’t destroy my content.
musingstudio 
Since writing that post, I’ve found that WordPress supports posting source code via shortcodes. See http://en.support.wordpress.com/code/posting-source-code/ Having said that, I think you still have to be careful, some C++ templates, streaming or inclusions got mangled again temporarily, suggesting that it only works in the “Visual” editing mode.