FW upgrade + pkg Compatibility matrix

[kokoro]

Hi,

May somebody make a sum up of upgrade/compatibilities paths for FW and SW, please?

Reason: i am using wl500gp with
- Oleg with 1.9.2.7 pre 10 + ipkg
- upgrade to Oleg 1.9.2.7-10 -> OK (just need to reload flashfs to make ipkg apps up)
- then upgrade to 1.9.2.7.d-r2624 -> Partially Nok : the ipkg apps are not all up, manual/script lunch of lighttpd, cherokee, or thttpd give

Bus error

-> update: Ok, after a reboot, i do not get this issue... strange what so ever.

Do we need to switch to opkg with d or rtn?
Can we keep our existing applications ?
Can we keep/need ipkg?

Is there an "How To" to upgrade from Oleg to d or rtn, please?

BR,