Maybe it isn´t a bad idea to use a second or third scanner from time to time, but make sure deleting these files from your HD after finish scanning.

Here are the Threads about Panda:

http://www.avast.com/forum/index.php?board=2;action=display;threadid=144;start=0
and
http://www.avast.com/forum/index.php?board=4;action=display;threadid=83;start=0