Hello, I'm getting a series of these warning when I start a 64bit Win7 inside VirtualBox in a 64bit 3.0.0-rc3 linux. This happens when I open the session, not during the boot process. Here is a copy of the very first warning. Jun 20 09:44:35 tux kernel: ------------[ cut here ]------------ Jun 20 09:44:35 tux kernel: WARNING: at net/ipv4/route.c:1677 ip_rt_bug+0x5a/0x70() Jun 20 09:44:35 tux kernel: Hardware name: Vostro 1520 Jun 20 09:44:35 tux kernel: Modules linked in: tcp_lp fuse ipheth vfat fat vboxnetadp vboxnetflt vboxdrv coretemp hwmon cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 dm_crypt snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_seq uvcvideo snd_seq_device snd_pcm snd_timer snd soundcore iwl3945 iwl_legacy mac80211 dell_laptop r8169 cfg80211 dcdbas mii iTCO_wdt iTCO_vendor_support snd_page_alloc rfkill i2c_i801 microcode mmc_block sdhci_pci sdhci mmc_core firewire_ohci firewire_core [last unloaded: scsi_wait_scan] Jun 20 09:44:35 tux kernel: Pid: 4848, comm: VirtualBox Not tainted 3.0.0-rc3 #2 Jun 20 09:44:35 tux kernel: Call Trace: Jun 20 09:44:35 tux kernel: [] warn_slowpath_common+0x7a/0xb0 Jun 20 09:44:35 tux kernel: [] warn_slowpath_null+0x15/0x20 Jun 20 09:44:35 tux kernel: [] ip_rt_bug+0x5a/0x70 Jun 20 09:44:35 tux kernel: [] ip_local_out+0x24/0x30 Jun 20 09:44:35 tux kernel: [] ip_send_skb+0x9/0x50 Jun 20 09:44:35 tux kernel: [] udp_send_skb+0x115/0x3a0 Jun 20 09:44:35 tux kernel: [] ? ip_append_page+0x570/0x570 Jun 20 09:44:35 tux kernel: [] udp_sendmsg+0x338/0x940 Jun 20 09:44:35 tux kernel: [] ? __pollwait+0xf0/0xf0 Jun 20 09:44:35 tux kernel: [] inet_sendmsg+0x43/0xb0 Jun 20 09:44:35 tux kernel: [] ? current_fs_time+0x22/0x30 Jun 20 09:44:35 tux kernel: [] ? __pollwait+0xf0/0xf0 Jun 20 09:44:35 tux kernel: [] sock_sendmsg+0x106/0x120 Jun 20 09:44:35 tux kernel: [] ? do_ip_setsockopt+0x80/0xd60 Jun 20 09:44:35 tux kernel: [] ? _raw_spin_unlock_bh+0xf/0x20 Jun 20 09:44:35 tux kernel: [] ? udp_lib_get_port+0x20b/0x340 Jun 20 09:44:35 tux kernel: [] ? move_addr_to_kernel+0x6a/0x70 Jun 20 09:44:35 tux kernel: [] sys_sendto+0x134/0x180 Jun 20 09:44:35 tux kernel: [] ? ip_setsockopt+0x45/0x90 Jun 20 09:44:35 tux kernel: [] ? fd_install+0x38/0x70 Jun 20 09:44:35 tux kernel: [] ? audit_syscall_entry+0x1bc/0x1f0 Jun 20 09:44:35 tux kernel: [] system_call_fastpath+0x16/0x1b Jun 20 09:44:35 tux kernel: ---[ end trace daa5db172540fc0c ]--- Best, Paul