[xwiki-users] 1.5-RC1 Import Error

Hi all, I decided to try out a fresh install of 1.5 RC1. It's up and running fine and the database gets initialized on the first run. I go to the XWikiPreferences page to import the administration application. I browse for the xwiki-application-administration-1.1.xar file and attach it successfully. I click on the attachment in the "Select the file you wish to import" list and it expands the available documents to import list. I check all of the boxes, click Import, and get this error: Importing xwiki-application-administration-1.1.xar: Error while preparing importing * 0 Document(s) installed * 0 Document(s) skipped * 0 Document(s) with error There are no errors logged to the xwiki.log or my Resin logs. I get the same behavior in both Firefox and IE7. Has anybody seen this or know what may be causing it? With no useful feedback about what XWiki thinks is wrong, I have no idea where to start. -Jamie