For everyone having the problem with some icons (clock, powermanager etc) being invisible, try running cairo with indirect rendering:
cairo-dock -o -i
This fixed the problem for me. Please follow up if it works on your system.
For everyone having the problem with some icons (clock, powermanager etc) being invisible, try running cairo with indirect rendering:
cairo-dock -o -i
This fixed the problem for me. Please follow up if it works on your system.