Hello everyone,
Since I started this blog, with Maxim Tarrasenko's help, I've been using it to share with the community how I fixed problems in hope it would be helpful to anyone else - who knows, maybe when you turn to your search engine to search for a problem you're facing, you end up on my blog finding the solution because I run to it earlier...
I'm turning to this community now in hope someone already run into the same trouble I find myself on right now 
We have a SharePoint Portal Server 2003 SP2 farm, 2 web+search frontend servers, 1 index+job server, cluster sql with named instance. While searching today, it returns a portal blank page. :-(
Been trying to figure out what's wrong... none of the servers is registering any event log error or alert, index server is crawling and propagating without errors...
Have also looked into this post from Joachim Farla, but no luck: Portal search always returns blank results
In case anyone ever faced this problem, please let me know!!
Many thanks in advance 
*** UPDATE [06/11/2006] ***
We've finally got it working
Alexandro Cortiço opened a support incident and today the search problem was solved: this problem was caused by the SharePoint databases not being updated when Service Pack 2 was installed.
Please refer to this link for the solution: You cannot restart a SharePoint Portal Server 2003 database upgrade
Also, to check your databases versions use the SPS Report Tool.