Cannot Open Report or Form Within Reports or Forms Builder 10.1.2.3 (MS Windows Vista)

Developer Suite has been installed successfully on a MS Windows Vista system.To meet the MS Windows Vista certification this instructions were followed. On trying to open or to compile a reports module file (RDF) in Reports Builder, the Builder crashes.Opening a Forms module file (FMB) in the Forms Builder crashes the Builder.Error(s)Windows Vista complains there has been a problem in Reports Builder and is trying to work it out.But eventually, it states that Reports Builder is going to be closed.

This is because despite applying patchset 10.1.2.3 there are still issues in the 10.1.0.5 DB client causing the crashes.
Apply
Patch 7047034 ORACLE 10G 10.1.0.5 Patch 26 BUG FOR WINDOWS 32 BIT
to the ORACLE_HOME of the Developer Suite installation.

The patch can be downloaded from Metalink's PATCHES section doing a SIMPLE SEARCH for patch number 7047034 and platform MS Windows (32-bit).
Follow the instructions of the patch readme carefully.