I was trying to use a class 3 certificate to sign my emails (using KMail). with the class 1 certificate it works fine, but not using class 3 certificate. When selecting the sertificates in KMail, the class1 certificate is marked with a green check sign, but the class 3 certificate is marked with a red cross. I think that should be related to the trust setting in kleopatra.

Here is the whole storry:
I have imported the CAcert (www.cacert.org) root certificates class 1 and class 3. Beside that, I also imported my personal CAcert certifactes signed by the class 1 and the class3 CAcert certificates.
So in Kleoparta it looks like this:
 - CA Cert Signing Autohority        - A -
   - <MyPersonalCertificate signed by the class 1>     - B -
   - CAcert Class 3 Root      -C -
      - <MyPersonalCertificate signed by the class 3>      - D -
Kleopatra shows me (using customized colors for certificate categories), that:
  -A- is a trusted root certificate
  -B- does not fit to the categories (Black bold text, as in default settings)
  -C- category other keys (non-bold black text)
  -D- Same as -B-
Using the right mouse button, I can trust and not trust the certificate -A-. The coloring changes in relation to my selection, but this never changes coloring of the sub-certificates.
I can not change my trust in certificate -C-. I already added the fingerprints of the CAcert class 1 and class 3 certificate to gnupgp trustlist.txt. But still I can not change the trust on class 3 certificate. Maybe this is not possible, because it's listed as a sub-certificate of the class 1 certificate?
Anyhow, KMail only works using the class 1 certificate to sign my emails.


Reproducible: Always

Steps to Reproduce:
1. Import the class 1 and class 3 certificate  of www.cacert.org
2. Try to change the trust of class 3 CAcert root certificate
3.
Actual Results:  
Can change my trust in the class 1 certificate.
Can not change my trust in the class 3 certificate.

Expected Results:  
Can change my trust in the class 1 certificate.
Can change my trust in the class 3 certificate.