I'm using R# intellisense with case sensitive completion off.
On a new code line if I type,
I get IFormatProvider from the intellisense list.
If I type,
I get IFormatProvider()
I am also experiencing problems with intellisense and code completion. For example, I have 'se' as my short cut for string.Empty When I type 'se' and press I get SearchOption. The tooltip that prompts you to expand by pressing tab appears but pressing tab just selects the item in Intellisense.