I am having a problem where the event description in the widget is covered by dots.
I have set up above test site for you to have a look, the only things done are:
1. Installed WP 3.5
2. Installed and configured Callpress
3. Created 2 events
4. added the calpress widget to the sidebar
5. Installed Sufussion out-of-the-box
After step 4, the widget worked (with twenty-twelve, but I do not believe the error is related to suffusion
Can I ask you to have a look at it ?
Suffusion is a very popular theme, and I have used on another site without similar problems.