Formulas or text seems to have extra single 'quotation marks' (for a lack of a better indication). See attached screenshot in text like: motion acceleration and in formulas. This seems to be a rendering problem which did not appear in version 4.3.7.2 I used earlier.
Created attachment 123612 [details] Extra characters rendered
Any cleaner glyph rendering if you disable OpenGL rendering from Tools -> Options -> View
Thank you Stuart. This works. Would it be better to have this turned on automatically upon installation?
OpenGL is enabled by default on Windows builds when the GPU and driver are not black listed. If you have a well supported GPU with current driver the advantage of keeping OpenGL active are significant. Unfortunately there have been some issues with the Uniscribe/GDI+ based font rendering used through 5.1.1 release. The devs have been working on the OpenGL rendering engine for the Windows builds--removing the Uniscribe/GDI+ implementation and moving to DirectWrite for rendering with OpenGL acceleration. That was only just implemented in master -- the 5.2.0 nightly builds. That looks to be more reliable and higher quality, but probably will not be ported back to the 5.1 branch. You could experiment with different fonts for the formulas and paragraph text. But for quality font rendering in formula OLE and text, probably best to manually disable OpenGL rendering for the time being. Otherwise, IMHO keeping OpenGL enabled by default for systems that support it is correct for the project.
For QA housekeeping, going to dupe this out to bug 97171 *** This bug has been marked as a duplicate of bug 97171 ***
Stuart - we back-ported the DirectWrite stuff to -5-1 - it should be in 5.1.2.x - it fixes a number of bugs, and its a rather isolated change I hope =)