Operating system and graphics card
Windows 7 x64 - GTX 580 3 Gb for display, GTX 780 for rendering
Short description of error
When I saved a project, it takes sometimes up to 6 or 7 seconds to be saved and sometimes, it's instantaneous as usual. I tried with the 2.72b and no problem, it takes less than a second every time
Exact steps for others to reproduce the error
Based on a (as simple as possible) attached .blend file with minimum amount of steps
I checked the console and made 2 screenshots (one with Archimesh add-on activated, one with the add-on disabled) and I let you the userpref.blend. I just opened my project (size = 1,5 Mb) and click CTRL + S. I tried with other projects and same thing but not every time.