cdot is changed to rectangle under Windows 8 with version 4.3.5.2 (Build-ID: 3a87456aaa6a95c63eea1c1b3201acedf0751bd5)
Can you attach a document with an example? Can you attach a screenshot?
Created attachment 113311 [details] Screenshot
Can't test on Win 8 at this exact moment, but could not reproduce on Win 7 or Ubuntu with a cdot b in the formula editor. Win 7 Pro 64-bit, LibO Version: 4.4.0.3 Build ID: de093506bcdc5fafd9023ee680b8c60e3e0645d7 Locale: fi_FI Version: 4.3.0.1 Build ID: 67f5430184326974072b65403ef1d9d934fc4481 Ubuntu 14.10 64-bit Version: 4.4.0.3 Build ID: 40m0(Build:3) Locale: en_US
*** This bug has been marked as a duplicate of bug 60268 ***