How to avoid "Unable to read symbols for..." warning playing local UIWebView HTML files?

I have a UIWebView that loads local HTML files. In one of those files/pages I have a video file embedded (with <video> tag) that plays correctly in both simulator and iPad, but in iPad I get this annoying warning message:

warning: Unable to read symbols for "/Developer/Platforms/iPhoneOS.platform/DeviceSupport/3.2/Symbols/System/Library/Internet Plug-Ins/QuickTime Plugin.webplugin/QuickTime Plugin" (file not found).

The video plays correctly and audio is fine. The video format is .m4v that I made with QuickTime. I tried .mp4 but I get even more warning messages with missing decoders.

Any idea what's going wrong? OR what can I do to get rid of this annoying message? By the 开发者_开发知识库way I load the HTML files to the UIWebView this way:

[webView loadHTMLString:html_string baseURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] bundlePath]]];

Thanx for the trouble :/

Does this happen in the device? If not, it could be an old issue with the Simulator I've run into before myself. The problem that was one of my "Internet Plug-Ins" (for DivX) was giving the Simulator fits. I moved it to my desktop, re-launched the Simulator, and it was fine after that.