Now when I output a PDF, pages 8-9 don't produce crop marks, a colored text box doesn't show up and a dialog box comes up and say, "You may have problems viewing this document correctly. Please contact the person that created this doc". I've gone through hours of trying to eliminate what it could be w/no success. BUT...if I take—say page 9—in the pages panel and drag it down to the end of the catalog it outputs fine.
Our two standard recommendations:
Trash, Replace, Reset, or Restore the application Preferences: http://forums.adobe.com/thread/526990
Clean corrupt files by exporting to Interchange Format (.inx): http://forums.adobe.com/thread/526991
I was thinking maybe it's a corupted prefernces file, but I do have some custom preferences I've made and I've forgot where to find that file and how to restore it if it doesn't work. If I do trash the preferences and close ID, when I relaunch ID and open my .indd catalog file, will it automatically create a new preferences files & load the preferences I have built into the doc?
See above. You should trash the preferences while ID is closed, not while it is open. It will automatically create new preferences files, yes. It will maintain the preferences that are document-specific when you load the document, yes.
In this case, however, it sounds more like local file corruption than prefs...