I've noticed that the same project opened with 1.8.0 version shows different duration than the same project opened with 1.9.0 version.
The files opens correctly but my colleague with 1.9.0 sees duration =1 day, where I see duration =2 days with my 1.8.0 Project Libre version. Tried to save with 1.8.0 = same problem, tried to save with 1.9.0, problem solved only upgrading to same version.
I've fixed some import problems of .pod files created with ProjectLibre versions<=1.8 in 1.9
Please have a look to ProjectLibre 1.9.1. It should solve your problem.
Yes with version 1.9.1 the problem is solved.
Thank you