[Mono-list] Messages in apache error log

[Tomi]

Hi folks, I'm using mono (with sgen), xsp and mod_mono from master
(master/7f146f9 Tue Jan 18 21:07:17) on Ubuntu Server 11.04 with
apache 2.2.16. I'm hosting there several ASP.NET MVC 2 web
applications either on mod-mono-server2 or mod-mono-server4 and I can
see in error.log of apache these kind of error messages:

[Thu Jan 27 15:59:26 2011] [error] command failed: failed to send file
(file data)
[Thu Jan 27 15:59:26 2011] [error] command failed: failed to send file
(file data)
[Thu Jan 27 15:59:27 2011] [error] command failed: failed to send file
(file data)
[Thu Jan 27 15:59:27 2011] [error] command failed: failed to send file
(file data)
[Thu Jan 27 15:59:28 2011] [error] command failed: failed to send file
(file data)
[Thu Jan 27 15:59:28 2011] [error] command failed: failed to send file
(file data)
[Thu Jan 27 15:59:28 2011] [error] command failed: failed to send file
(file data)
[Thu Jan 27 15:59:28 2011] [error] command failed: failed to send file
(file data)
[Thu Jan 27 15:59:28 2011] [error] command failed: failed to send file
(file data)
[Thu Jan 27 15:59:28 2011] [error] command failed: failed to send file
(file data)

and sometimes these exceptions:

(info) Auto generated encryption keys not saved:
System.Security.SecurityException: No access to the given key
  at Microsoft.Win32.KeyHandler..ctor (Microsoft.Win32.RegistryKey
rkey, System.String basedir, Boolean is_volatile) [0x00000] in
<filename unknown>:0
  at Microsoft.Win32.KeyHandler..ctor (Microsoft.Win32.RegistryKey
rkey, System.String basedir) [0x00000] in <filename unknown>:0
  at Microsoft.Win32.KeyHandler.Lookup (Microsoft.Win32.RegistryKey
rkey, Boolean createNonExisting) [0x00000] in <filename unknown>:0
  at Microsoft.Win32.UnixRegistryApi.OpenSubKey
(Microsoft.Win32.RegistryKey rkey, System.String keyname, Boolean
writable) [0x00000] in <filename unknown>:0
  at Microsoft.Win32.RegistryKey.OpenSubKey (System.String name,
Boolean writable) [0x00000] in <filename unknown>:0
  at (wrapper remoting-invoke-with-check)
Microsoft.Win32.RegistryKey:OpenSubKey (string,bool)
  at System.Web.Configuration.MachineKeyRegistryStorage.OpenRegistryKey
(System.String path, Boolean write) [0x00000] in <filename unknown>:0
  at System.Web.Configuration.MachineKeyRegistryStorage.Store
(System.Byte[] buf, KeyType kt) [0x00000] in <filename unknown>:0

Websites are working correctly (at least I didn't notice any unwanted
behavior during testing), but I'm little bit concerned about these
messages in error log. Any ideas where might be the problem? Thanks
for your time and help.