Does this happen with all users and all block types or is it just the resume field block type?
We had a similar screenshot in another bug report recently and it was only happening for one user -- we never got to the bottom of it unfortunately.
I still haven't reproduced the problem but if you have time to try it out I'd be especially interested to know if this patch makes any difference:
http://gitorious.org/mahara/mahara/commit/464490363dedecd9d274cc13feefb19b1ee1cbd5
R.
I just tried on IE7 and have been unable to duplicate the problem you're seeing in the screenshot. How many resume fields has that user filled out? I tried going to your Mahara but registration is disabled - if you create an account, maybe I can log in and have a quick look at your site.
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