Yes it will cause problems to today plugins and Input Panels,they wont appear again.
So reinstall them
For apps like Pocket Plus, PBreeze, vito button Mapper: save their settings on your storage card
Apps like Indibar, AE Button Plus dont need registry for settings so they will be fine as ever
Also use PPC PIM Backup to backup call logs, speed dials, messages, etc. in case spb Backup doesnt do it perfectly like in my case
Most of the apps (like 80% of them) will run fine, so you will only have to reinstall the other 20% of them.
Note: First of all fully backup your device using SPB Backup and PPC PIM Backup utilities; in case active sync still doenst work for you after restore you might want to fully restore your device to its earlier state
So reinstall them
For apps like Pocket Plus, PBreeze, vito button Mapper: save their settings on your storage card
Apps like Indibar, AE Button Plus dont need registry for settings so they will be fine as ever
Also use PPC PIM Backup to backup call logs, speed dials, messages, etc. in case spb Backup doesnt do it perfectly like in my case
Most of the apps (like 80% of them) will run fine, so you will only have to reinstall the other 20% of them.
Note: First of all fully backup your device using SPB Backup and PPC PIM Backup utilities; in case active sync still doenst work for you after restore you might want to fully restore your device to its earlier state