More details from c4evaspeaks.com:
We just had a development meeting with C4E and he dropped a bombshell. Thanks to the recent silent DAE update he has been able to discover how to hit DAE/AP25 with the “Silver Bullet” and has developed iXtreme LT 3.0 which defeats DAE/AP2.5 reliance COMPLETELY.
A new FW and a new version of XBC will be released to get you up and running again in no time.
We can also confirm that C4E has finished the Hitachi LT 2.0 fw (not affected by DAE/AP25) and will be releasing that as soon as its gone through final testing.
There's a temp workaround solution for the new DAE update here.
Although it’s early stages, c4eva has successfully completed several tests which validate this new method and classified his solution as the “silver bullet” for AP2.5. Rather than using captured challenge results each time the dae.bin changes, the new method builds a complete set of profile data for each disc and works for all AP2.5 challenges, regardless of how the dae.bin is changed. As a result, the format of backup ISOs will be changing as the AP25 replay sector will no longer be included and the profile data will instead take its place. Though c4eva noted that it will take some development time as it’s not a quick fix, both he and the team will now be putting their full efforts behind bringing this solution to life in the form of new versions of iXtreme LT+, Xbox Backup Creator, and abgx360.