When resolving, verifying, reopening issue in JIRA the comment can be added as an option. But later, when looking at the comments history it is not clear whether one particular comment is 'just a comment' or it was added when issue was verified, resolved etc., if only it has not been specified evidently by user. Wouldn't it be better if some info or even icon was added automatically to any comment that describes the reason why it was added.
For example:
Oleksandr Shevchenko added a comment >>>ON VERIFYING ISSUE<<< - 2010-06-17 16:29 - Comment #2