Along with launching GTA Online, Rockstar has fixed some GTA 5 story mode issues in the first patch that was uploaded yesterday. (via an automatic update) You can find the patch notes below.

• Fix for interface issues when using Internet on the cell phone after completing the game, or during a mission replay
• Fix for the Vanilla Unicorn occasionally becoming locked
• Fix for issues where the character’s money could drop below zero and become stuck there
• Fix for the Epsilon Program missions not progressing properly after delivering some cars
• Fix for issue where the Atomic Blimp sometimes does not appear as a phone contact for Collector’s Edition owners
• Fix for issues with saved vehicles going missing, or losing their upgrades
• Fixes for several map escape and collision issues along with other various bug fixes