I have just noticed that one of internal pages which has gained PR in the PR update of 24th of June has lost PR. So I went to check and run <a tool that I use> against internal links on the home page and compared this with the same data I have taken on 24th of July.
Well, there have been some changes again. Not as many as in the June 24th update, but I have seen changes on a few sites I am watching.
The interesting thing is that this time all PR changes I am seeing are for a page jumping from a gray bar --> some PR or from some PR --> gray bar, whereas in June there were also changes where a page would go from some PR to a different PR.
So, according to the data I have, there have been at least 5 PR changes since beginning of May, and the dates I have are:
8th May, 19th May, 28th May, 24th June, 2nd July
There could have been other changes in PR in between that I have not spotted.
[edited by: tedster at 9:33 pm (utc) on July 2, 2009]