We literally never delete any posts... so maybe you posted to a different thread? All of your posts will be listed in your account page. Feel free to post it again here if you want.
In terms of this problem, we were able to find a new executable for the preview that doesn't rely on IE and it appears to be working in a BETA. We will include it in a free dot release soon to fix this issue.
For now people should probably just disable preview if they are having this problem and we will have a more permanent solution available soon.