FM Webclient not displaying all discovered fabrics

FM version 4.1(3b) FM server works as expected.

Webclient displays two symptoms so far, of the two fabrics only one is displayed and when I try to add the missing fabric I am informed that its already added. Other symptom is that performance stats for End Devices are missing - though others, eg. ISLs are there.

I am unable to assertain when this started as we do not look at web stats every day. I have restarted the Performance Collector service within the web client and left it running for some time. This didn't fix the missing data issue.

Has anyone seen this before? Could someone give me a pointer or clue as to where to look next?

Thanks

Neil Hopwood