[Solved (partially)] 100% CPU for Reader

Question

Here is a detailed description why Reader ends up using 100% CPU (output taken from strace, unimportant lines removed):
socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) = 12
connect(12, {sa_family=AF_INET, sin_port=htons(80), sin_addr=inet_addr("192.150.8.100")}, 16) = -1 EINPROGRESS (Operation now in progress)
poll([{fd=3, events=POLLIN}, {fd=12, events=POLLOUT}], 2, 0) = 0 (Timeout)
poll([{fd=3, events=POLLIN}, {fd=12, events=POLLOUT}], 2, 15) = 0 (Timeout)
until here, everything is fine. Reader polls for events on the socket descriptors with a timeout of 15ms.
I our case, Reader is running on a Kiosk system, so connection to most hosts are forbidden, including pmupsw.adobe.com ("192.150.8.100"). So after some time the connection fails.
poll([{fd=3, events=POLLIN}, {fd=12, events=POLLOUT}], 2, 13) = 1 ([{fd=12, revents=POLLERR|POLLHUP}])
Unfortunately, now the poll() returns immediately. Reader does not handle the POLLERR, so it ends up polling the socket in a tight loop.

Answer 1

Running Ubuntu 10.04 LTS on HP6715 notebook. I had the 100% cpu utilization issue. I changed the adobe proxy setting from direct connect to manual. I entered the proxy settings at my company. This fixed the issue. It would be nice if adobe could use the system proxy settings.
This issue was documented here
http://blogs.adobe.com/acroread/2008/04/100_cpu_utilization_problem.html