I already wrote about this problem in an already resolved topic, so I guess that's why I didn't get any answers.
Anyways - although problem with wysiwyg editor interfering with diacritics shortcuts was supposedly resolved, there's still problem with getting ą and Ą. Apparently, alt+a shortcut is mapped to "select all" function. Same goes for alt+shift+a.
I wasn't able to find any shortcut mapping options, so I figured I'd write about it here. Would apprecieate any help.