Having been plagued by this pretty much harmless error in my log files for a long while, I finally googled and came up with what was creating the following error message:
## Component Manager: attempting to find symbols in a component alias of type (regR/carP/x!bt)What's causing the message is the "Toast Video CD Support.qtx" file in /Library/QuickTime. If you don't need Toast Video CD support in QuickTime, you can get rid of that file, and the error all in one step.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20021211054158940