ezwebin 1.0 and 1.1 has a float bug that can under some circumstances show up in explorer, I suggest you upgrade to ezwebin 1.2 ( and ezpublish 3.9.2/3.9.3/3.9.4 witch contains the upgrade script ).
Hope it helps!
Ps: if you want to try to fix it yourself I recommend the 'ie developer toolbar' witch is for ie what firebug is for firefox when it comes to CSS and DOM browsing
EDIT: It strikes me that I'm unsure if this is fixed in 1.2, because I was thinking about the columns float issue. Could you try to recreate the issue on our demo site?
http://now.ezpublish.no/ login: editor / publish
If it's not fixed, what explorer version are you using?