While fixing one problem with MIDI remote control in iOS version 2.6, I created a new problem -- remote control actions triggered by MIDI Note messages are now broken. I have just submitted version 2.6.1 to fix this:
http://www.bandhelper.com/support/release_notes.html
If you use MIDI Note messages for remote control and have not yet installed version 2.6, please wait until 2.6.1 is released.
Version 2.6.1 was approved by Apple this morning and is now available for download.