Issue:What are those yellow squares with an exclamation point next to dimsentions?
A new feature called the Annotation Monitor was introduced in AutoCAD 2013-based products that is shared with AutoCAD 2013 that shows dimensions and leaders that have lost their associativity.
When the geometry associated with the dimensions is moved or changed, the dimension values will update when associativity is enabled.
To quickly locate dimensions or leaders that have lost associativity with their geometry, the yellow 'badge alerts' will appear when the Annotation Monitor is turned on.
If you hover the cursor over one of the yellow boxes, 'Disassociated Annotation' will appear at the cursor's location.