Currently I am using GVim on Cygwin 64-Bit Windows 7 with Pyclewn plugin for debugging C/C++ Application.
Whenever the balloon eval tooltip pops-up the Color difference between the balloon background the underlying text content is too small to be easily readable.
I have tried setting the:
:highlight Tooltip guibg=white
as mentioned in the gvim help
But to no-avail.