I’ve solved the gtkmm issue using the proposed patch. Now I think it is working fine (I’ve tested in Jalv and qtractor). This fix has been uploaded on svn revision 100. If you get this code, please be warned that the subversion code installs the plugin under the ~/.lv2/ (user home directory) instead of /usr/local/lib/lv2/ and this can cause some troubles if your maintain a EQ10Q version under an other path. I suggest to point the main CMakeLists.txt to /usr/local/lib/lv2 or delete any previous installation of EQ10Q.
@dsreyes1014: you can use the following command to get the revision 100 which is full functional:
svn checkout -r 100 svn://svn.code.sf.net/p/eq10q/code/trunk eq10q-code
OK, with a new song, I decided to use EQ10Q as my standard-eq. Works like a charm! Well done… 