i used a class 10 card today and all was smooth...the indicator never appeared and no auto stops...

Some T1i owners had this happen using Kingston Class (6) cards (one had it with 3 cards!). Canon advised the camera can be "brand finicky" and suggested SanDisk Extreme III.

That solved the problem. Nikon D90 sometimes did the same thing, again SanDisk Extreme III did the trick.

That is not normal for a quality properly functioning card.

Your Transcend Class (6) is trying to do the same thing to you the Kingston Class (6) did, just not quite as bad. It will let you down when you can least afford to have it do so.

Patriot, A-Data, Delkin, and Transcend are all cards that will not give you the performance SanDisk Extreme III will.

You've now tried two lower cost cards and should have seen you can't trust them.

You shouldn't have to do that. It is not your camera although Canon has admitted some samples can be "brand finicky". When I had a T1i I shot both stills and video on the same SanDisk Extreme III card and never had a problem.

I now do the same thing on SanDisk Extreme IV 45Mbps (or faster) CF cards in the 7D and also have no problems.

Get the right card and you should have no problems.

If you get that buffer bar AT ALL you have an underperforming media card.

Look, you guys have spent close to a Grand or better on the camera. If you want the dependablility that goes with that price buy a decent card. If you're out on a project the last thing you need is to be "second guessing" your media.

Thank you Bruce for the info. Will get a sandisk

I just got this error on my brand new 60D, I just upgraded from the T2i and never had any problems with the same card, a little disconcerting! It was a Class 10 Patriot, 16 GB, but as Bruce is implying, you get what you pay for!

Worst part of it was, I was in a helicopter for the first time in my life!!!! I still got some amazing shots though....

Absolutely love the 60D otherwise!

Patriot LX Series 32G Class 10 positive experience
 

New 60D and 3 new Patriot LX 32G Class 10 cards formatted in camera before use. Shot all day...10 hours...no problems at all.

Solved
 

Hey all, I figured out my problem, I was trying to snap a picture while shooting video, something I did frequently on the T2i, and video would normally resume after the shot. Problem is I've been shooting RAW photos recently, and I think it just couldn't handle that amount of data, switched it to JPEG and everything seems good again.

just out of curiosity...

1. why does Canon impose the 4GB limit, and could Canon remove this via a f/w update
2. how do you record long coverage then? use the HDMI out to a hard disk recorder like a Ki Pro?

Answer to your first question: there is no officially stated reason. Sources at Canon once told me that the 4GB clip length limit is there to prevent standard definition recordings from exceeding 30 minutes, thereby avoiding a significant tax penalty upon buyers in the European market. There's also the possibility that the 4GB clip length limit is self-imposed in order to protect sales of Canon's professional video camcorders series (XF, XH and XL H models). However, there are a number of other ways in which a D-SLR can't replace a pro video camera, so that reason isn't a very strong one.

Answer to your second question: you don't. The outgoing HDMI signal contains graphic overlay information which cannot be removed. Long-form recording of uninterrupted clips is more suitably achieved with a proper video camcorder, such as the afore-mentioned XF, XH and XL H series cameras.

Is either point changeable by firmware update? Unknown, but not at all likely to happen. Perhaps a third party will undertake it, but not the manufacturer. Hope this helps,