Salesforce Release Notes for Summer’14 Release contain following information on pages 238-239
Increased Maximum Length for Long Text and Rich Text Fields
The maximum length for Long Text and Rich Text custom fields has been increased, from 32,768 characters (32 KB)
to 131,072 characters (128 KB). The default length remains 32,768 characters, and existing fields are unchanged. To
increase the length of an existing field, edit the field in Setup.
Increased Maximum Number of Relationship Fields
The maximum number of Relationship Fields per object has been increased, from 25 fields to 40 fields.
Increased Maximum Number of External ID Fields
The maximum number of custom fields used as external IDs has been increased, from 3 fields per object to 7 fields per
This means many certification trainings contain old and obsolete information like this one (“3. 25 lookup relation relationships allowed per object”) and this one (“19. What is the maximum number of lookup fields in an object? 25″) and this one: “How many External IDs may an object contain? 3” .