I get the same. I turn off all my intellisense options in VS, including
three under Text Editor | C# | General | Statement Completion and Text Editor
| All Languages | General | Statement Completion. I have to go back in and
turn them off every now and again though....maybe a VS thing?
i've upgraded from 2.02 (deinstalled) to 2.5.300.
In some cases the both (VS and R#) intellisense windows shown up.
Within the option the R# intellisense was activated.
After switching to VS intellisense and back to R# intellisense the
problem seems gone.