Why does MS Word now only paste as plain text from Firefox and Opera

I used to be able to copy and paste from HTML sources to MS Word 2003 and it would paste all the info including tables, formating etc. Now it seems that there has been a change somewhere that now only allows me to do this from IE7 to Word and if I try to copy from Firefox or Opera all I get is plain text. Does anyone know why this is now the case? and if it is a Microsoft change, isn’t it against the law to limit a non-Microsoft applications capabilities?