IMC shows too high cpu utilization on Juniper MX104 router

[EV13]

We have 4 Juniper MX104 routers. IMC shows their cpu utilization ten times bigger than the router. If the router shows cpu utilization is 9 %, IMC show utilization 90%. Most of the time in the working hours IMC shows cpu utilization 100 %  on these routers.

We had previously Juniper MX5 routers and their cpu utilization showed quite right. I have loaded new mibs but it didn't help. This problem exist in IMC's versions 7.2 and 7.3, now  E0506P07.

[rd08]

We also see this with Enterasys switches. It seems Enterasys returns the cpu usage based 1000 not 100. It returns 90 for %9 cpu usage and 900 for %90 cpu usage. I could not find a way to fix this in IMC.

[EV13]

I used analyzer to catch the traffic. It looks like imc is showing the right numbers. All other cpu's are on the level 10% except routing engine 0 which is going up and down.  I'll have to dig into MX104 to find what's going on. On our traffic levels there should be lower cpu burden.