google PR with www and without www

[benevolent001]

hi,just today only i noticed this,after the PR update recently all the 20 pages of our website got PR4,earlier only our homepage www.mydomain.com/index.htm was having PR 4
but after this update all have got 4

any way my question is this ,i found a big problem for our website
i found that when i enter www.mydomain.com it shows PR4 and when just mydomain.com/ it gives PR3.
Whats this
i thinks google cosiders these as different urls and indexing to give diff PR
i wanted to know how much PR you think we are loosin due to this considering the fact if the google had considered both URLs same
main thing is that how can i find those links on the web which are back links to both these urls and correct the problem so that we may gain some PR as sice 3 months we have just 4 and we want to improve it

Your suggestions and comments are anticipated

[NoClue]

"i thinks google cosiders these as different urls and indexing to give diff PR "

This is correct. The best way to go about this is to implement a permanent redirect (in your .htaccess file) from domain.com to www.domain.com so that ALL PR will go to your www.domain.com.

[g1smd]

This question comes up every few days, and the answer has two parts:

- if you do nothing, Google will eventually consolidate both of the results into one when they run a process over their database to do this; but the problem is that they only do this a couple of times per year - so you could be waiting many months.

- you can use a 301 permanent redirect to direct people from domain.com to www.domain.com and the results will combine faster. You will also need to find as many of the sites that are linking to you as domain.com as possible, and ask them all to change their link to be www.domain.com instead.