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It does appear to be related to some of the content in that post. Searching the bug database, I found this: http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCsw42942&from=summary.It says that it is fixe...
You don't need to create a WLAN for each subnet. Look here: http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a008073c723.shtml.
Try increasing the timeout in hrcConfig.ini located in C:\Program Files\Cisco CRS Historical Reports. Default was 30 seconds. Increasing it to 120 worked for me.