I'm having trouble getting chart_Series to render properly with markdown to
html.  Are others using chart_Series with markdown?  What am I doing wrong?

The Pub at this link should be self explanatory:
http://rpubs.com/gsee/chart_Series_knit

The .Rmd file used to produce it is below.

Thanks,
Garrett

Why doesn't chart_Series look right?
========================================================

```{r message=FALSE}
library(quantmod)
getSymbols("SPY", src='yahoo')
```
This looks fine
----
```{r fig.width=7, fig.height=6}
chartSeries(SPY)
```
But, why does this look wrong? i.e. instead of being aligned at the left
margin,
there is a box with a question mark.
```{r fig.width=7, fig.height=6}
chart_Series(SPY)
```

	[[alternative HTML version deleted]]

