read from socket gives different output when blocking/nonblocking

[Björnke von Gierke]

I am trying to do a little irc application. For this I made a small 
stack which can connect to a server and then send the login 
information. The question that I have is this: Is this a bug and if no 
what am I doing wrong?

My test server is efnet.demon.co.uk i am connecting on port 6666. A 
typical conversation using blocking read's would be like this:

connection
the server sends me three lines with the end of line delimiter crlf:
NOTICE AUTH :*** Looking up your hostname...
NOTICE AUTH :*** Checking Ident
NOTICE AUTH :*** Found your hostname
I send my authentication strings:
PASS
NICK Bjoernke
USER guest 0 bar :Bjoernke von Gierke
And so on

but when I do this whit a nonblocking read, i get this:

connection
the server sends me three lines with the end of line delimiter crlf:
efnet.demon.co.uk:6666
efnet.demon.co.uk:6666
efnet.demon.co.uk:6666
Now I would send my authentication, but its kinda senseless, as I am 
unable to get any useful data.


the code I use:

--blocking
on mouseUp
     read from socket field "server" until crlf
   put it & return after field "log"
end mouseUp

--nonblocking
on mouseUp
   read from socket field "server" until crlf with message "finished"
end mouseUp

on finished theMessage
   put theMessage & return after field "log"
end finished