Disk quotas out of sync

[Simon]

Hello Folks,

Ever since I went from 6.x to 7.x I have started experiencing disk quotas getting
out of sync, way out of sync. For example, a user with 160GB quota suddenly
shows usage of only 120GB This forces me to run quotacheck -av often.  Was
something changed regarding quotas in 7.x? Nobody else noticed this issue?
I have this issue across multiple, different hardware, servers running 7.x

Thank you for any insight and help in advance!

PS: please CC me

-Simon