Xbuntu / AMD
Short description of error
When working in the VSE, if you create a marker there's an invisible "marker area" that's created a the bottom but you can still see the strips underneath even though you can't interact with them in this area. The marker area would really need to be its own thing and push the rest of the VSE upwards so those two areas are not in visual conflict.
Note: Pablo (Vazques) asked me to report this as a bug.
Exact steps for others to reproduce the error
Go to the VSE
Add a strip on layer 0 (bottom layer)
Create a marker
Try to interact with the strip with the cursor at the bottom of the VSE