hi
this is an old thread, but it still happens
we had limited success with creating a new timeline messing with the compressors, and copy/pasting.
but then it happened again, this time, the only thing i can think of, is that we are low on space on the RAID (doesnt make sense, because it is filling more space), or there is something that sees that the RAID is extremely fragmented. this second option is more of a superstition than anything else.
end result: try the suggestion, sometimes it works.
kenzan