**System Information**
Operating system and graphics card
Windows 7 64 bit, Nvidia graphics card.
**Blender Version**
2.72 560dd93
**Short description of error**
**Exact steps for others to reproduce the error**
Based on a (as simple as possible) attached .blend file with minimum amount of steps
The attached .blend file has a scalp with hair. The problem occurs when you press the "Bake" button in the "Cache" panel in the particles window. The message says: "2 frames on disk" if the Cache Step is greater than 1 but works OK if the Cache Step is set to 1. {F119451}