I want to try this deck, but these card issues are troubling. Are people having issues even with the approved cards?
I'll try to give you an objective response.
It's tough to answer your question with a high level of confidence about where this is going but the trend over the last month or two is positive. In general, I think people are having success using approved cards; however, there has been some limited evidence that 'the issue' has revealed itself on at least one of the card types on the approved list (two reported events from different users...same card). In one of those instances, a reformat of the card using an outside SD card formatter has cleared the issue and the user reports no problems using that same card in the unit since. In the other, it's not clear if the problem was cleared up or if the user has used the suspect card in the unit.
As an owner of a unit that has been problematic in the past, I also own this same card. I've used the unit twice with the card and it's performed well over approximately eight hours of use. I have other recorders available to me, so unfortunately my confidence level using this deck still has a ways to go before I would consider pulling it out as anything but a backup, but that's because I have other units available to me that I have more confidence in. Obviously, the more people report success and the more successes I experience, the more my confidence grows, but the two instances of glitchy experiences with approved cards continues to infect my conscience.
A month or two ago I wouldn't have recommended this unit, but now that it seems the number of reported incidents has calmed down and the negative trend seems to have turned, and people are having success using a low priced approved card (16gb Sandisk is available for around $15), I'd say to go ahead and buy. The DR70D is a great value at $200.
That said, if you have an absolutely mission critical recording, you might want employ some redundancy until you're absolutely sure your DR70D/card combo will perform for you.