I am avast user for years now.
I regularly run scan from Microsoft Security Essentials (MSE),
MSE found Registry cleaner RegCure (Trial version 2.0) of ParetoLogic Inc.
as a POTENTIAL THREAT.
http://i761.photobucket.com/albums/xx255/samnetx/MSEPT10-02-2010.jpg?t=1266582171
Virustotal results show nothing
http://www.virustotal.com/analisis/eaa20081113092cea171fb43db226cec6e23d48eb0de231ba09857d8474cfe59-1265801913
CCleaner (version 2.28.1091) - Copyright 2005-2009 Piriform Ltd.
I regularly use CCleaner everyday to clean Temporary Files and to Clean Registry.
I have been using CCleaner over a year and it is detected as suspicious by MSE.
Many computer users use CCleaner as it is free.
http://i761.photobucket.com/albums/xx255/samnetx/MSECC10-02-2010.jpg?t=1266502553
virustotal results
http://www.virustotal.com/analisis/d328c0fe7117e0d308e100805a17ce860531eacd187c2fe66396cb6944da175a-1265796369
avast5.0.396 not detected anything in these both files.
View the images of detection by Microsoft Security Essentials attached with this post.
samnetx