I use icewm. I notice that in the move to TC3.0 (all alpha's), the dropdown menu (right click on background) no longer contains a "Applications" ("tce extensions") entry. I am guessing that icewm may need an update, as this was not the case in 2.11.
This does not happen with flwm. The dropdown menu works as expected.
Also, the "TC Tools" entry in this dropdown is incomplete, that is, not all tools are listed. Perhaps not compatible with icewm?
Otherwise, I am having no problems so far with alpha3.