I run a test FOSS box I use for testing and archiving. My FOSS and NE systems are both 5.0.12 currently. I did a 5.0.9 to 5.0.11 upgrade cleanly, I assume a 5.0.9 to 5.0.13 should be smooth as well.
I'm installing right now before I load it on the production NE unit. I'll report back when I am done.
Mail | Dell 2950III | 2x Quad Core 5420 | 8gb RAM | 6x 146gb SAS RAID 0+1 | Red Hat 5.3 | Zimbra 6.0.10 Network Edition
Test | VMware ESXi Whitebox | Phenom II Black 3.2ghz | 12gb RAM | 6x 1tb SATA RAID 0+1 | CentOS 5.4 | FOSS, Not in use now