Same problem here with a Win7-32bit/NV8800GT/AMDX2 3800+. Disable "h264 support" may work, but also disables any GPU hardware acceleration(so its more like a workaround and not a fix!). HTML5 videos work fine in Chrome or Firefox tho.

Just wait until its finished? Give me 100Mbit download and i have no problem, but this is just inconvenient. Chrome and Firefox just stop the download and notice me that something went wrong, but doing something in advance(restarting the download), that i as a user, never approved,and cant even turn off, seems wrong to me.
I think Opera needs to enhance their downloadmanager.

Still no way to disable automatic download restart in Opera 27. Strangly with some bigger files Opera doesnt delete the just downloaded file. But small mp4 files get deleted. Guess i have to put this in the Suggestion Forum? ...or use Firefuck again

Hello, Opera names download-files with "x.opdownload" and renames them (deletes the extension) after successful download.
Sadly, scince Opera 26, opera deletes the file if it cant be renamed, for example, if the file is already used by another programm, for example a video file in VLC.
Now i would like to disable automatic download-restart or at least not delete the file i just downloaded(rename new download with e.g."x(1)").
Any suggestions?