website displays in different manner in different machines(client)

hi,
I made a website using php-mysql-apache support in linux redhat machine.I am working on a server machine.My site can be accessed by other 40 client machines(someone using XP or linux as OS).My problem is that my images and php tables are appearing mis-aligned in some machines.It doesnot show as i designed it.In some 10 or 15 machines,its ok.But what is happening to other machines.i also want it to work on different browsers also in the same way as i perceive in my site.i am using galeon(linux) browser for developping it.
plz clear my doubt

Well we can't guess what your problem is. It clearly a browser compatibility problem but how can we help unless you show us.

Nor will you get it right unless you can testing in different browsers.

Firefox is easy on linux & using konqueror would give you 1/2 an idea how it would look in safari. (I am not sure what engine galeon uses BTW)
For IE either install WINE or better still run vmware & a copy of 98/2000/XP inside that.

I think this belongs in a HTML/CSS forum, as this is not a problem related to PHP.