high %CPU values after upgrading to the last stable kernel

sbs
2008-10-22T19:37:52Z

after upgrading from 2.6.16 to 2.6.27 kernel top shows a strange
picture of extremely highly %CPU values.

# top -V
top: procps version 3.2.6

# top
top - 04:24:06 up 7 days, 1:12, 1 user, load average: 2.28, 2.03, 2.00
Tasks: 183 total, 2 running, 181 sleeping, 0 stopped, 0 zombie
Cpu(s): 36.2% us, 2.4% sy, 0.0% ni, 56.1% id, 4.7% wa, 0.1% hi, 0.5% si
Mem: 12473092k total, 11169060k used, 1304032k free, 16k buffers
Swap: 2048248k total, 636k used, 2047612k free, 1257988k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
19824 b 20 0 92212 17m 5420 S 4308 0.1 1:39.49 httpd
14396 b 20 0 92716 28m 16m S 3721 0.2 38:47.38 httpd
14024 b 20 0 92376 28m 16m S 2437 0.2 51:49.68 httpd
7415 b 20 0 96876 40m 24m D 2146 0.3 93:59.72 httpd
8182 b 20 0 94500 36m 21m S 1997 0.3 111:41.60 httpd
13461 b 20 0 94240 31m 17m S 1439 0.3 48:43.71 httpd
8466 b 20 0 92036 32m 21m S 1136 0.3 107:37.90 httpd
17620 b 20 0 92660 23m 11m S 1003 0.2 10:55.03 httpd
14025 b 20 0 92000 28m 16m S 720 0.2 51:49.49 httpd
3808 nobody 20 0 3013m 2.9g 592 S 714 24.7 343030:50 memcached
10 root 15 -5 0 0 0 S 714 0.0 11881:28 ksoftirqd/3
18487 b 20 0 91416 20m 9572 S 580 0.2 8:29.20 httpd
13252 b 20 0 93408 30m 17m S 580 0.3 45:19.69 httpd
17525 b 20 0 93208 23m 10m S 566 0.2 18:34.40 httpd
14760 b 20 0 93452 28m 15m S 534 0.2 57:34.65 httpd
3804 nobody 20 0 2995m 2.9g 592 S 441 24.6 378908:26 memcached
12209 b 20 0 92312 28m 16m S 279 0.2 63:28.45 httpd

%CPU is 4308 here and it's not the highest value.
i havent seen that on any previous kernel on the same server.

should i upgrade procps or downgrade kernel then to get proper values back? :)
or is it a feature of the new kernel?

thank you