you suck

If you require an account to be made, and give me two fields to enter a password, I would SERIOUSLY appreciate it if you would lay out the requirements clearly. Do not give me a "streamlined" interface devoid of any instructions whatsoever on allowable characters and then kick me back with a giant list of ERROR! when I magically do not, in fact, mind-read your completely arbitrary rules for password acceptability. I have had this happens so many times now.

ETA: and having fixed my password oh my god, if you have an issue with my username, kindly point that out at the same time you're telling me about the password! Do it all at once so I don't have to keep resubmitting. ARGH!