If our current problems relating to memory management on our DS servers continue much longer, we may end up throwing on SP4 (OES SP1) before I'm really ready for it. SP4 is the first service pack after the main release of OES, so it counts as a first service pack and all that entails. There is already a critical NSS patch that you need to apply after SP4. And the support forums are reporting issues regarding existing iManager 2.5 installs.
One of the new gotchas for SP application these days involves Java. For a while now Java has had to be unloaded before the SP could go in, since most SPs update Java. Unfortunately, Java is Java so it can complain about unloading. And if Java refuses to unload gracefully during SP application, your SP application will freeze. Whee! So the support forums are recommending that you reboot your server before you apply the SP, unload java manually, and then doing the SP.
One of the new gotchas for SP application these days involves Java. For a while now Java has had to be unloaded before the SP could go in, since most SPs update Java. Unfortunately, Java is Java so it can complain about unloading. And if Java refuses to unload gracefully during SP application, your SP application will freeze. Whee! So the support forums are recommending that you reboot your server before you apply the SP, unload java manually, and then doing the SP.