ReadyNAS 104 wont install any apps FW 6.5.2 (and also 6.6.0)

No.

I just forced apt to update some packages:

# apt-get install smbplus
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 bzip2 : Depends: libbz2-1.0 (= 1.0.6-4) but 1.0.6-7+b3 is to be installed
 libtinfo5 : Breaks: dialog (< 1.2-20130523) but 1.1-20120215-2 is to be installed
 libxaw7 : Depends: libxt6 but it is not going to be installed
 libxcb1 : Depends: libxau6 but it is not going to be installed
 libxft2 : Depends: libfontconfig1 (>= 2.9.0) but it is not going to be installed
           Depends: libfreetype6 (>= 2.3.5) but it is not going to be installed
 libxmu6 : Depends: libxt6 but it is not going to be installed
 locales : Depends: glibc-2.19-1 but it is not installable
 xterm : Depends: libfontconfig1 (>= 2.9.0) but it is not going to be installed
         Depends: libxt6 but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
root@Nas01:~# apt-get -f install
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
  bzip2 dialog fontconfig-config libfontconfig1 libfreetype6 libxau6 libxt6
  locales
Suggested packages:
  bzip2-doc
The following NEW packages will be installed:
  fontconfig-config libfontconfig1 libfreetype6 libxau6 libxt6
The following packages will be upgraded:
  bzip2 dialog locales
3 upgraded, 5 newly installed, 0 to remove and 26 not upgraded.
Need to get 5400 kB of archives.
After this operation, 2256 kB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 http://mirrors.kernel.org/debian/ jessie/main libfreetype6 armel 2.5.2-3+deb8u1 [411 kB]
Get:2 http://apt.readynas.com/packages/readynasos/ 6.6.0/main locales all 2.19-18+deb8u6.netgear1 [3944 kB]
Get:3 http://mirrors.kernel.org/debian/ jessie/main fontconfig-config all 2.11.0-6.3+deb8u1 [274 kB]
Get:4 http://mirrors.kernel.org/debian/ jessie/main libfontconfig1 armel 2.11.0-6.3+deb8u1 [314 kB]
Get:5 http://mirrors.kernel.org/debian/ jessie/main libxau6 armel 1:1.0.8-1 [20.0 kB]
Get:6 http://mirrors.kernel.org/debian/ jessie/main libxt6 armel 1:1.1.4-1+b1 [155 kB]
Get:7 http://mirrors.kernel.org/debian/ jessie/main bzip2 armel 1.0.6-7+b3 [46.6 kB]
Get:8 http://mirrors.kernel.org/debian/ jessie/main dialog armel 1.2-20140911-1 [237 kB]
Fetched 5400 kB in 4s (1198 kB/s)                              
debconf: delaying package configuration, since apt-utils is not installed
Selecting previously unselected package libfreetype6:armel.
(Reading database ... 14573 files and directories currently installed.)
Preparing to unpack .../libfreetype6_2.5.2-3+deb8u1_armel.deb ...
Unpacking libfreetype6:armel (2.5.2-3+deb8u1) ...
Selecting previously unselected package fontconfig-config.
Preparing to unpack .../fontconfig-config_2.11.0-6.3+deb8u1_all.deb ...
Unpacking fontconfig-config (2.11.0-6.3+deb8u1) ...
Selecting previously unselected package libfontconfig1:armel.
Preparing to unpack .../libfontconfig1_2.11.0-6.3+deb8u1_armel.deb ...
Unpacking libfontconfig1:armel (2.11.0-6.3+deb8u1) ...
Selecting previously unselected package libxau6:armel.
Preparing to unpack .../libxau6_1%3a1.0.8-1_armel.deb ...
Unpacking libxau6:armel (1:1.0.8-1) ...
Selecting previously unselected package libxt6:armel.
Preparing to unpack .../libxt6_1%3a1.1.4-1+b1_armel.deb ...
Unpacking libxt6:armel (1:1.1.4-1+b1) ...
Preparing to unpack .../bzip2_1.0.6-7+b3_armel.deb ...
Unpacking bzip2 (1.0.6-7+b3) over (1.0.6-4) ...
Preparing to unpack .../locales_2.19-18+deb8u6.netgear1_all.deb ...
Unpacking locales (2.19-18+deb8u6.netgear1) over (2.19-13.netgear1) ...
Preparing to unpack .../dialog_1.2-20140911-1_armel.deb ...
Unpacking dialog (1.2-20140911-1) over (1.1-20120215-2) ...
Setting up libfreetype6:armel (2.5.2-3+deb8u1) ...
Setting up fontconfig-config (2.11.0-6.3+deb8u1) ...
 
Configuration file '/etc/fonts/conf.d/README'
 ==> File on system created by you or by a script.
 ==> File also in package provided by package maintainer.
 ==> Using current old file as you requested.
 
Configuration file '/etc/fonts/fonts.conf'
 ==> File on system created by you or by a script.
 ==> File also in package provided by package maintainer.
 ==> Using current old file as you requested.
Setting up libfontconfig1:armel (2.11.0-6.3+deb8u1) ...
Setting up libxau6:armel (1:1.0.8-1) ...
Setting up libxt6:armel (1:1.1.4-1+b1) ...
Setting up bzip2 (1.0.6-7+b3) ...
Setting up locales (2.19-18+deb8u6.netgear1) ...
Generating locales (this might take a while)...
Generation complete.
Setting up dialog (1.2-20140911-1) ...
Processing triggers for libc-bin (2.19-18+deb8u6.netgear1) ...