Another data point for jeffa's results:

version 5.00503
unable to open file file3: No such file or directory
unable to open file file2: No such file or directory
unable to open file file1: No such file or directory
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Update: Fwiw, strace gives the following:

version 5.6.0
open("/no/such/directory/file3", O_RDONLY|0x8000) = -1 ENOENT (No such
+ file or directory)
brk(0x80fa000)                          = 0x80fa000
fstat(1, {st_mode=S_IFREG|S_ISUID, st_size=0, ...}) = 0
mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) 
+= 0x40014000
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
write(1, "unable to open file file3: \n", 28) = 28
open("/no/such/directory/file2", O_RDONLY|0x8000) = -1 ENOENT (No such
+ file or directory)
write(1, "unable to open file file2: \n", 28) = 28
open("/no/such/directory/file1", O_RDONLY|0x8000) = -1 ENOENT (No such
+ file or directory)
write(1, "unable to open file file1: No su"..., 53) = 53
SYS_175(0x2, 0xbffff8c4, 0, 0x8, 0x2)   = 0
munmap(0x40014000, 4096)                = 0

version 5.00503
open("/no/such/directory/file3", O_RDONLY) = -1 ENOENT (No such file o
+r directory)
open("/usr/share/locale/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENO
+ENT (No such file or directory)
open("/usr/share/locale/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT
+ (No such file or directory)
fstat64(0x1, 0xbffff6f0)                = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 
+-1, 0) = 0x40468000
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
write(1, "unable to open file file3: No su"..., 53) = 53
open("/no/such/directory/file2", O_RDONLY) = -1 ENOENT (No such file o
+r directory)
write(1, "unable to open file file2: No su"..., 53) = 53
open("/no/such/directory/file1", O_RDONLY) = -1 ENOENT (No such file o
+r directory)
write(1, "unable to open file file1: No su"..., 53) = 53
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
munmap(0x40468000, 4096)                = 0
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After Compline,
Zaxo