I upgraded to Ubuntu 16.04 lately and reinstalled texlive and texmaker to write in latex. When testing it for a new document I saw that the pdf was not being displayed properly. To clarify the document was shrinked in the vertical direction. When switching to the default ubuntu Document Viewer the pdf was displayed normally which leads me to believe that the document compiles properly (pdfLatex) but the viewer does not display it properly. I didn't have this problem in Ubuntu 14.04 and uninstalling and reinstalling - after reboot - texmaker didn't do anything either.