[Users] featurestore limit?

[Mick Jagger]

> > I'm new to Geoext and am having problems loading a layer with several hundred features into a featurestore using a grid for display.  After about 200-300 features it no longer loads.  Not seeing any errors in firebug, just seems to timeout and not finish.  Is there a limit to how many features can be loaded?
> 
> You're probably hitting the limits of the browser.

Using just OpenLayers by itself opens the layer fine.  Are there some limits associated with adding ExtJS?