Can anyone please help?
I just upgraded my IE 7 to IE8. When I open a contents page in MOODLE it pushes the contents links to the edge of the screen.
There may be several things you can do...
Try first to put to your theme header.html right after <head>
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />
that should force IE8 to emulate IE7 for all visitors.
If it does not help see http://tracker.moodle.org/browse/MDL-18645
Meta tag SHOULD work but it is essential to place it right after to <head>
Code of all themes and other code of moodle should probably be checked to support IE8 as IE8 and later HTML5 but emulating IE7 with meta tag is an easy-to-do "temporary solution" - in most cases.
Mauno
Try first to put to your theme header.html right after <head>
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />
that should force IE8 to emulate IE7 for all visitors.
If it does not help see http://tracker.moodle.org/browse/MDL-18645
Meta tag SHOULD work but it is essential to place it right after to <head>
Code of all themes and other code of moodle should probably be checked to support IE8 as IE8 and later HTML5 but emulating IE7 with meta tag is an easy-to-do "temporary solution" - in most cases.
Mauno
Did you try both modes in IE 8, the standard complience mode and the socalled compatibility mode?
For more details see http://moodle.org/mod/forum/discuss.php?d=135323#p592088
For more details see http://moodle.org/mod/forum/discuss.php?d=135323#p592088
Setting IE8 permanently to compatibility mode from browser settings is a nice solution for each individual PC - but then we loose the "good, new features of IE8" and it needs to be done separately for each and every PC - for example with:
"In order to enable and turn on Compatibility View mode for all web pages and websites, click on Tools menu, and select Compatibility View Settings. In the "Compatibility View Settings" dialog, tick the check box for Display all websites in Compatibility View option. Click on Close button when done."
...or you can click the compatibility view button always when something is wrong...
If meta tag does the same thing for all IE8 visitors without button clicks or changing of settings of each IE8 it is "less painful" and in ideal case css and javascripts of site should be directly compatible with IE8 but that's not the case on most moodle sites.
IE is always IE - versions just change but every version brings new IE bugs and "features"... 
I understand Microsoft has a tradition of applying the "95 percent solution" (It works for 95% of the people for 95% of the time.") to all its products but for me, that is just lazy and inept programming. It is outrageous that they have managed to get away with it for so long.