The custom field description shows the markup code. Here is an example:
If Exposure = 1-4, then select <bold>(Low)</bold>
If Exposure = 5-10, then select <bold>(Medium)</bold>
If Exposure = 11-25, then select <bold>(High)</bold>
Before the upgrade, custom field descriptions looked normal:
If Exposure = 1-4, then select (Low)
If Exposure = 5-10, then select (Medium)
If Exposure = 11-25, then select (High)