I've seen a few topics of the same pop up here lately and now also got the same.

I copy/past my correct details & then the client gives me error login, or can't login.

Then i have to close the client & restart it, do the same & everything works fine.

I don't think this is a big issue, just tough it would be interesting to let you know.

Typing your credentials in manually is guaranteed to work everytime aslong as you have the correct username and password.

Usernames are case sensitive, as well as passwords 

Happened on every pc i use.

Just had to close & restart the client.

 

 

Usernames are case sensitive, as well as passwords 

Happened on every pc i use.

Just had to close & restart the client.

 

Hmmm, strange. So it's fixed now?

 

Yes, after closing and re-opening the client.

I don't think it's a big problem, just noticed searching around here a bit.