BTW...any suggestions re my problem of not getting sd-ext card backups with Clockworkmod? Is it a kernel thing? (I checked my old backups from franco#4 and they don't have my ext2 partition either).
Four things occurred to me:
1. I haven't gone too deep on this but as far as I know the recovery has its own kernel (I don't know if it's a complete one or has only the necessary parts for the recovery).
2. CyanogenMod has a different kernel (msm7x27) that, if I'm not mistaken, in the very few first nightlies didn't support ext partitions (they forgot to enable it)
3. The recovery 5.0.2.0 is from the pre-CM era, when all the kernels were based on the stock one from LG (so I suppose recovery's kernel should be similar to those ones)
4. But the recovery 5.0.2.7 was released in January 12, just when we started to have official CM nightlies (so I highly suspect it has the - at the time - brand new kernel of CyanogenMod for P500)
Connecting the dots, I believe ClockworkMod Recovery v5.0.2.7 has problems with ext partitions because it uses the faulty CM kernel we had those days.
P.S.: At that time (January), I used v5.0.2.7 only for a short while, installing back the v.5.0.2.0 and keeping it since then. I simply suppose this is what could be causing the mentioned problem for some people (although I haven't seen anybody clearly state that v.5.0.2.7 doesn't work with ext partitions).
Try using ClockworkMod Recovery v5.0.2.0.