I cannot read text in my WYSIWYG editor!?!You cannot read the article text in your WYSIWYG-editor because it has some annoying black/blue/some other dark colour?
Is that colour the same as your site template's background?
Single login for multiple clients in Joomla! 1.0?Before Joomla! 1.0.8 due to a problem in the session implementation it was possible to login with one username simultaneously multiple times. This was corrected in Joomla! 1.0.8.
WYSIWYG editor removes HTML code
With the "Edit HTML Source" option of your WYSIWYG editor you can put HTML code in your article. However the HTML code will be stripped upon saving.
Even if you use the no WYSIWYG ( "Editor - No Editor") which can be set in Global Configuration and/or the parameters of your user account in the User Manager.