Now that we are on Patch 0.5.5.2, the issue is still here.
I've done some testing on my computer (GTX 970 with 3x 1080p displays), if nVidia Surround is setup for 3 monitors surround, it's a "NO GO", but if it's setup for 2 monitors surround, then I can login (no issue with Server Field being blank).
Having the Surround on 3 monitors and system resolution set to 1920x1080 doesn't help.
The problem is clearly something in the game detecting "3 displays" or "more than 2" and not knowing how to handle it...
By the way, the only "workaround" I know works is : disabling Surround before launching the game, and re-enabling it post login.
Nickola
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I did further more experrimenting... and was able to display correct logon screen (with server etc) with 3 displays... but in a rather unusual configuration.
I mean, we almost al play with surround / Eyefinity configured for a 1 x 3 display (1 line of 3 screens and 5780x1080 rez), I changed my surround to have it setup to 3x1 (1 column of 3 screens 3240x1920 rez) and here i was able to login properly. I know it's useless for us gamers/customers, but It may be of some help for the Dev's.
Can someone try to reproduce and confirm, please ?
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