Usually I use only Firefox, but there enough people which still use IE. And I don't think they will change there browser only for visiting my adoptables site

. But I understand that there are many coding differences which make it nearly impossible to create a css which will work perfectly with every browser.
I discovered a easy way for myself to solve the problem with the myadopts.php and the message.php. I simply remove all css-codes from the pagination class. It might not be the best way but now the pages shows up correctly in IE and Firefox.
Now only the profile.php make still some trouble.