Error While logging in to gmail

I got below error when I tried to login to gmail. Does any one face the same issue?

Undefined variable. Variable: opt_initialName. Node: {name opt_initialName} at ./cs/caribouroot/java/com/google/caribou/ui/pinto/modules/navpane/label.js line 313:

// Ask user for label name
var label = prompt(pinto.navpane.Label.LABEL_NEW_LABEL_PROMPT,
opt_initialName ? opt_initialName : '');
while (label != null) {
Undefined variable. Variable: opt_initialName. Node: {name opt_initialName} at ./cs/caribouroot/java/com/google/caribou/ui/pinto/modules/navpane/label.js line 313:

// Ask user for label name
var label = prompt(pinto.navpane.Label.LABEL_NEW_LABEL_PROMPT,
opt_initialName ? opt_initialName : '');
while (label != null) {

Surprisingly, it happened only with one account. Why so?? How is that possible?
Did they deploy different builds on different servers? So, my another account has correct build, so it didn't give any error where as my other account has wrong build, so giving this error?


Updates:
Some issue at google end. It works fine with non-JS link, http://mail.google.com/gmail/h/