Scan errors (Inno installers and unpack errors)

I have a folder with a bunch of program installers in it and NOD 4 shows these errors on scanning. There is nothing wrong with the files that I can see (ie. I have installed the programs using them with no problem) I'm assuming NOD can't scan these files due to the errors which is kind of annoying because how can it detect malware in them if it can't scan it? I'm not concerned about these files in particular but that's not really the point

A couple of examples of the entries I am getting:

ccastfx.zip » ZIP » setup.exe » INNO » setup.data - error - unknown compression method

allwaysync-n-go-8-3-1.exe » INNO » - unsupported option

Gaim_Portable_2.0_B5_en-us.paf.exe » 7ZIP » GaimPortable/App/GTK/bin/xmltok.dll » UPX v12_m5_dll - unpack error

 

7zip and INNO support was added about 1-2 months ago. It will take some time to add support for various compression methods.

 

Okay fair enough However I don't understand why I am getting these errors if 7zip and INNO support has now been added? Unless this support is in a yet to be released version?

 

file from here
http://www.esnips.com/doc/f33d892c-96d3-4949-a9e0-81f1ab482164/ccastfx

setup is a rather old version from INNO-Setup 1.xxx (dated on the year 2000).
IMO there is no option to unpack that - but why? <sigh>