Hi there!
For one of our studies, we ran multiple MEGA-PRESS pilots over the past months. When analyzing the data, I noticed a difference between the analysis performed back in March and the analysis performed in June/yesterday. When - within the GUI - looking at the DIFF spectrum, the header showed me FWHM (GABA) back in March.
Now, the header shows me FWHM (tCr) but the values seem to reflect FWHM of GABA:
I am using Osprey 2.9.5 (downloaded February 14th 2025) and did not update anything since then. I also used exactly the same job file.
To be sure that it was not something related to the job file or other changes I may have made unintentionally, I reran the analysis from March - and I get the same values, but instead of FWHM(GABA), the header now shows FWHM (tCr).
Happy to share more screenshots (was not possible with the restricted new user-privileges).
Not sure whether that is important because to the best of my knowledge, these values are not typically used as quality measures and also not reported in the “QM_processed_spectra” file. Still seemed like something that might confuse people - like me. 
Thanks a lot for any feedback and best,
Laura