I've just installed WAMP on my Windows Vista Ultimate and i tried on a Windows XP and it also gives me the same result.
I have a web that executes a while command to show all the tables rows. Where I load that page on wamp server, it returns a blank page. I've tested the same page at a web server and it's ok.
I don't if there is a kind of cache or refresh time on wamp that i have to edit.
When i a open a table from my database, i can get the rows, but when i open 2 or 3 tables in sequence, wamp returns me a blank page.