julinho - 11:48 pm on Apr 5, 2004 (gmt 0) And I agree with you, your homepage should go to PR5 next update.
This is the strongest evidence of the weight of internal links in the composition of PageRank.
Your external links bring your / page to PR3, whereas the internal links bring your index.php to PR5! Unless you have some high PR deep links, your case shows that one can increase (by much) PR just by cleverly adding more pages and internal links.
And I agree with you, your homepage should go to PR5 next update.