Did an oil and filter on dads FL1 TD4 the other day. I noticed when I removed the old filter that it had been crushed in its length (twisted). This filter was one supplied by the local Repco branch and was Ryco brand. I compared it with the new one also from Repco and Ryco and it is the same length. I did a bit of research on this and found the equivalent Fram filter is 2mm shorter so won't twist when installed. Also none of the smaller O-rings supplied with the Ryco unit fit, they are all to big and loose.
Ryco Length 117,diameter 64.
Fram Length 115,diameter 64.
The local Repco are looking into this isse and have passed on the old filter to Ryco for a look.

Adrian