2.5.51 nanosleep fails

nanosleep fails after being interrupted:

[...]
fstat64(3, {st_mode=S_IFREG|0644, st_size=5444, ...}) = 0 gettimeofday({1039564416, 703895}, NULL) = 0
nanosleep({1, 0}, NULL) = 0
fstat64(3, {st_mode=S_IFREG|0644, st_size=5444, ...}) = 0 gettimeofday({1039564417, 777452}, NULL) = 0 nanosleep({1, 0},
[1]+ Stopped strace tail -f /var/log/uucp/Log

md@wonderland:~$ fg
strace tail -f /var/log/uucp/Log
 <unfinished ...>
--- SIGCONT (Continued) ---
<... nanosleep resumed> 0)              = -1 ENOSYS (Function not implemented)

This can be reliably reproduced.

Linux wonderland 2.5.51 #13 Tue Dec 10 14:15:49 CET 2002 i686 unknown unknown GNU/Linux

ciao,
Marco