What steps will reproduce the problem?
1.Create hosts file, hosts.txt, containing something like a-b-c[7-12].x.y.com
2.Run csshX --hosts hosts.txt

What is the expected output? What do you see instead?
Open terminal sessions are expected, but other than the master window, only one 
window with the title a-b-c[7-12].x.y.com is seen.  In that window is seen:
ssh_exchange_identification: Connection closed by remote host
CHILD at /usr/local/bin/csshX line 1256.  (The windows for the individual hosts 
appear for a brief instant, but spontaneously close.)

[Process completed]


What version of csshX (do a "csshX -v") are you using? On what operating
system version (do a "sw_vers")?

$ csshX -v
csshX  0.74

$ sw_vers -productVersion 
10.8.5

Please provide any additional information below.
Specifying the hosts using the interval notation on the command line works 
fine, e.g.

$ csshX a-b-c[7-12].x.y.com

csshX is great, and this issue isn't a showstopper.