I've had my Galaxy Ace nearly 18 months with no complaints. Installed new, larger SD card about 5 months ago. Had no issues. Last thing I've installed was Words With Friends over 2 weeks ago.
Today my phone froze, and after I restarted it, it gave me the topic error message.
I've restarted at least 5 times, I've made sure the card was inserted correctly, it works in my husband's phone... what the crap is wrong?
Interesting point: the same thing happened with my last Samsung phone.