need help with thesis, CSS, scripts, uggggg

I have this client that is seriously a PITA.. I under-quoted and screwed myself with the terms so I just need to finish this...

the big issue right now is browser display- in Firefox it is fine, but in IE and safari is is all wonky, columns, scrips not showing, etc. etc.

I am at a loss, so many LITTLE issues I just can't seem to find- possibly just because I am so frustrated so I am hoping one of you will be able to take a peek and say yeah- do this.... lol

http://stage2010.rebeccalself.com/

Some of the issues so far:
---widths all messed up in Safari
---IE not displaying any of the scripts- has the last one all down the side and everything...
---cant get rid of the box below single posts where comments were going to go (she wants NO comments anywhere on blog- strange I know- but it is her blog lol)
---the slider box on the top right rotates through just fine but the first time it goes to the first one again it is blank... if that makes sense? She HAD almost 25 of these rotating but I talked her down to 5

those are the main issues- I would be sooooo grateful for any help in getting this done!!!