Wow. So glad to find this post and its not just me. Have been in contact several times with Humax over last couple of weeks and yet to receive a satisfactory reply. After noticing this problem I have at Humax request been testing using HD, SD and +1 recordings and its hit and miss with all. Used particularly renovation nation as its daily and had failed recordings on all 3 formats showing no stable reason failing. What is strange is i have an older 4000t which I have re-set up and that has recorded all programmes correctly and without fail so suggest this is a Humax Aura problem and not channel 4.
Have now cancelled continuous record and set up each day individually so will see how that works.
I do hope this problem is sorted soon, suggest everybody mails Humax to put extra pressure on, as watching all these adverts on catch up is annoying the hell out of me hehe.
Bill