Assume you have a subversion repository with the following structure:

/repos
   |
   + Project_1
        |
        + branches
        + tags
        + trunk
             |
             + File_1
             + File_2

where development is performed against the HEAD version in /repos/Project_1/trunk.

Using the subversion command line tools or other tools like TortoiseSVN, KDESVN,
RapidSVN, Subclipse (for eclipse), etc..., when you checkout files, you specify
the trunk as the repository location to be checked out, and the HEAD as the
version.  If you specify that it should be checked out to \Projects\Project_1
you will get a checkout where File_1 and File_2 are located at
\Projects\Project_1\File_1 and \Projects\Project_1\File_2.  This is standard
behavior (as demonstrated by the Subversion command line tools and the
subversion manuals).

When using the Subversion plugin to NetBeans, this same checkout scenario
results in a folder "trunk" being placed in \Projects\Project_1 such that the
checked out file locations are \Projects\Project_1\trunk\File_1 and
\Projects\Project_1\trunk\File_2.  This behavior is non-standard and should be
corrected to the standard behavior.