Just installed Draftsight V1 R5.2 and now seem to have a problem using pan middle mouse button pan and zoom.

 I was able to carry out these operations without issue in V1 R5.1 .

Has anybody had similar issues with this new release?

System:  HP Envy Laptop, 12GB of RAM, i7 processor, NVIDIA GeForce GT 740M graphics (2GB), Windows 8.1

Problem seems to have been with the Laptop Mouse I was using. One I tried another mouse the problem went way.