SGS2 + CM9: Flash 20120504 Build

Looks like a long list of features/fixes to be included in the following build (the one after 20120504). Flashed 20120504 to get the kernel upgrade (from 3.0.29 to 3.0.30).

Steps
1. Used ROM Manager to create backup
2. ROM Manager prompted to install CWM Recovery? Proceed.
3. Phone rebooted to re-flash CWM Recovery (downgraded to v4.*, should be v5 previously)
4. Used ROM Manager to create backup, now successfully.
5. Copied update-cm-9-20120504-NIGHTLY-galaxys2-signed.zip to internal storage.
6. Used ROM Manager to reboot into Recovery.
7. Flashed update-cm-9-20120504-NIGHTLY-galaxys2-signed.zip
8. Wiped cache partition.
9. Wiped dalvik cache.
10. Reboot.
11. Done