it's not really a bug, more a lack of feature
if people register to the wiki using an email account they opened in walla.com the e-mail never arrives to them
it might happen since walla use different protocol or some other problem
i don't know
but since many people here in israel use it and walla usually don't care about users feedback (security holes, compatibiloity to firefox etc') it would be nice if there was a little script you could download (or it might be included in the wiki as default - but that should be discussed about) that checks if the text after the @ when registering is either walla.com or walla.co.il
i.e.
username: bla
password: bla
email:
bla@walla.co.il
and if it's walla.com or walla.co.il the sending of the email will be different
i don't know PHP and i don't know why the email never arrives if you use walla, so it would be nice if someone can write a little script or pinpoint the problem
thanks