Today we had a breakthrough with one user that has been having issues with his Buttons and dialog elements disappearing. We found that the issue was a clash between the current setup of his Graphics Drivers and TBCs use of WPF Graphics. In TBC the dialogs have been created in the early days using Windows Forms and more recently dialogs are created using WPF technology. We found that the issue was only affecting those parts of TBC that are using the WPF functionality like the Create Vertical Design command and all of the TML commands and the Start Page of TBC etc.
The resolution was to de-install the Graphics Drivers 100% and then reinstate them from scratch. This has cleared the customer issue and he is now working 100% correctly.
To do the deinstallation of the Graphics Drivers (he had to deinstall both the Intel and Nvidia Drivers from his Dell Machine and reinstate both) he used a tool available from this link - I have not used it personally and cannot say that it will work for all machines in all situations with this problem, but it has solved one persons issue so please try this if you are experiencing similar issues.
Thanks to Andy from Riverside Construction for his help and assistance here and his patience in getting this solved. He tested both 5.32 and the upcomingv5.4 and both worked fine.
Awesome - One headache over!