If you're using the Octatrack for sample loops or stems make sure to export them out at 16bit 44.1kHz for optimal beat matching. (16bit will save you some ram in your flex machines)
I totally forgot about the bpm quirk while getting ready for a show. Exported out about 10 Renoise songs and mapped them to the octatrack only to find the bpm was slooowwwwwww and off time with a static tempo even without timestretching. Had to redo a lot of exporting tonight because I didn't know my MacBook instance of Renoise was set to 48.
May save a headache or two for y'all