Wordpress debugging

Hi guys! I have some Wordpress bugs that need to get fixed. 1. The "read more" links on the site don't work anymore. Clicking on them doesn't show any response. Thoough clicking on the "tags" shows a functioning "read more" link. 2. In Internet Explorer there is a debug error giving a message "undefined". 3. The widgets dissapear, f.e. the Fod-Pod Widget. The problems started after upgrading to a newer Wordpress version. If you are sure you can handle this problems quick and really read the text above end your message with *READ*.