There were serious problems with fonts in code editor in VS 2010 Beta 2. That is the reason that I am submitting this occurrence, even though I could not reproduce the behaviour.
In VS 2010 RC I have FixedSys Excelsior 3.01 font in editor. It is set to size= 12.
This is the best ergonomical font - easy on eyes.
I experienced sudden font size change while scrolling page of code with mouse wheel.
Font changes size to about 7.
The font changed only in one tab, other tabs with code were displaying correctly.
The only place I know to change font size is in:
Menu>Tools>Options>Environment Fonts and Colors
But this window was NOT open at the time of the occurence.
Closing and reopening the tab will fix the problem.