Crashing, freezing, disconnections and major lag for no apparent reason. And when I try to log on the Start button is grayed out so I have to close the client and try again.

I haven't noticed any of that, but for some reason, it takes forever after I press the Start button for the game to load up.

it only happens during the boss event fight

Now i cant do anything on DBO i can't talk add people nothing . When i try to change channels for this it doesnt work. It could just be the Boss Event thing. Hope it ends soon. :(

Well based on what I see from the forums, this latest patch has added alot of issues. I would recommend waiting for maintenance to see if that fixes your problems. Also, you may want to report this issue to wasabii. If they get enough feedback, I would imagine they would fix the problems.