[collectd] iptables, netlink, irq plugins seems not to work correctly

[ConiKost at gmx.de]

Hi,
i've installed collectd 5.0.0 on my gentoo machine and configured it. According to the log file, the three plugins iptables, netlink and irq seems not to work. Collectd is being started as root.

At startup, the iptables says:
Jul 20 11:10:50 [collectd] lt_dlopen ("/usr/lib/collectd/iptables.so") failed: file not found. The most common cause for this problem are missing dependencies. Use ldd(1) to check the dependencies of the plugin / shared object.

ldd /usr/lib/collectd/iptables.so
  linux-gate.so.1 =>  (0x77860000)
  libip4tc.so.0 => /lib/libip4tc.so.0 (0x7784d000)
  libc.so.6 => /lib/libc.so.6 (0x776d4000)
  /lib/ld-linux.so.2 (0x77861000)

netlink and irq are logging the whole time:
Jul 20 11:14:21 [collectd] plugin_dispatch_values: Invalid value list.
                - Last output repeated 3 times -
Jul 20 11:14:21 [collectd] parse_value: Failed to parse string as number: IO-APIC-edge.
Jul 20 11:14:21 [collectd] parse_value: Failed to parse string as number: IO-APIC-fasteoi.
                - Last output repeated 4 times -
Jul 20 11:14:21 [collectd] parse_value: Failed to parse string as number: PCI-MSI-edge.
                - Last output repeated 4 times -
Jul 20 11:14:21 [collectd] netlink plugin: ir_read: rtnl_dump_filter failed.

It seems, its trying to parse my /proc/interrupts, as there i can find those strings:

cat /proc/interrupts
           CPU0       CPU1       
  0:   14761142          0   IO-APIC-edge      timer
  9:          0          0   IO-APIC-fasteoi   acpi
 16:         81          0   IO-APIC-fasteoi   i915, ath9k, uhci_hcd:usb5
 18:          0          0   IO-APIC-fasteoi   uhci_hcd:usb4
 19:          0          0   IO-APIC-fasteoi   uhci_hcd:usb3
 23:        150          0   IO-APIC-fasteoi   ehci_hcd:usb1, uhci_hcd:usb2
 43:    1730940          0   PCI-MSI-edge      ahci
 44:   10721795          0   PCI-MSI-edge      eth0
 45:     149258          0   PCI-MSI-edge      eth1
 46:   11543751          0   PCI-MSI-edge      eth2
 47:         72          0   PCI-MSI-edge      hda_intel
NMI:          0          0   Non-maskable interrupts
LOC:    1155253    8091436   Local timer interrupts
SPU:          0          0   Spurious interrupts
PMI:          0          0   Performance monitoring interrupts
IWI:          0          0   IRQ work interrupts
RES:     110000     138341   Rescheduling interrupts
CAL:        800        269   Function call interrupts
TLB:     321930     325747   TLB shootdowns
TRM:          0          0   Thermal event interrupts
THR:          0          0   Threshold APIC interrupts
MCE:          0          0   Machine check exceptions
MCP:       1874       1874   Machine check polls
ERR:          0
MIS:          0

Any ideas, how to fix this?
Thanks!