BUG #1806: Postmaster takes uses 99% of CPU

The following bug has been logged online:

Bug reference:      1806
Logged by:
Email address:      m.krueger@chs.de
PostgreSQL version: 7.4.8-0.6
Operating system:   Suse Linux Enterprise Server 9
Description:        Postmaster takes uses 99% of CPU
Details:

The Prozess Postmaster takes 99% of Cpu.

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
20726 postgres  17   0 19996 5356 4216 R 98.3  0.3  26:36.56 postmaster
19956 postgres  19   0 19996 6148 4936 R 64.4  0.3  28:38.38 postmaster
20005 postgres  24   0 19996 6244 5068 R 23.6  0.3  36:25.35 postmaster
19955 postgres  22   0 20060 6364 5156 R 10.3  0.3  34:25.64 postmaster
20014 postgres  17   0 19992 5264 4136 R  5.6  0.3  15:17.95 postmaster
10454 tomcat    25   0  608m 426m  12m S  0.3 21.1  12:47.47 java

I have read all the Faq. But there is no reason to it.
Could you help?