After upgrading to a higher service pack, you may need to reload customizations and reconfigure previous page designer changes.
We're currently evaluating this issue for a fix in a future patch or service pack.
Steps to Duplicate
1. Log-in to Sample 4.0 on SP3 (or SP4) 2. Go to Constituents and Add an individual. 3. Go into Design Mode. 4. On the Smart Fields tab, click Properties. Change the ItemsPerPage value from 50 to 400. Save. 5. Apply Service Pack 5. 6. Log back in and notice that your change from step 4 was overwritten.