In Safari, when I try to type Japanese language in a comment form, hitting space key, which is necessary to type in Japanese, is interpreted as "Enter". As a result, whenever I try to type in Japanese, the page automatically starts reloading.
This doesn't happen in other browsers like Firefox or Chrome. Also this doesn't happen with other site's comment form as far as I tested.
Because this happens not only with Twenty Twelve but also with the other theme called ExtraNews which I purchased, this might be a bug for those who use the same comment format by WordPress.
Any input would be appreciated.