Upgrading Drupal

OK to start with the following is my setup:

SUSE 9.3
Apache 2.0.53
PHP 5.0.3

I am running multiple web sites on this box, as well as multiple Drupal site under the one root.

I have run PHP Info on the box and mod_rewrite is still there.
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Now to the problem.

I had Clean URLs working and everything was fine. I decided to do the right thing and upgrade the box with YAST and everything is upgraded but.... Now Clean URLs (mod_rewrite) is not working.

When upgrading to this version - do I need to first upgrade my 4.6.3 version to 4.6.4?

I recently upgraded from 4.6 to 4.63, however I'm not sure if it is causing all these white pages to appear on my site. Basically only the front page works on my five drupal installations, if I click on anything else it goes to a white page. This happened shortly after I installed The Drupal Spam Module 2.0, could this module be causing the problems? It is only installed on two of my installations.

I just applied the latest patches to my Drupal 4.6.3 site, and am having problems because the patch removed the function valid_input_data from common.inc, however the function is still called from within file.inc (in function file_save_data, line 419). Can anyone tell me if I've done something wrong with the patches, or how to get around this???

Thanks in advance.

Just upgraded to 4.6.4 - and patched the htmlspecialchars (&) problem. Everything seems to work fine now, except when I try to attach a file to a node I get this error message repeated many times:

warning: mime_magic: invalid type 0 in mconvert(). in /path/to/www.dimmeria.com/includes/file.inc on line 149

When I updated my site to 4.6.4 I got a complaint from a subdomain user that his site was no longer visible from sub.domain.com/ but still worked from sub.domain.com/index.html. I'm no whiz when it comes to modifying htaccess but I think the following line change fixed everything:

Old:

line 12: Options -Indexes

New:

line 12: Options +Indexes

This made the subdomain available from sub.domain.com/ again.