If the RAE were to get its way, neither one would have an accent: http://www.rae.es/rae/gestores/gespub000018.nsf/(voAnexos)/arch8100821B76809110C12571B80038BA4A/$File/CuestionesparaelFAQdeconsultas.htm#novOrto5
That doesn't mean I'm going to stop using it :P
There's a propposal from RAE (Real Academia Española) for not using the "tilde" for "solo" anymore. After I knew about that, I no longer used the accent in any occasion.
Take a look:
An excerpt from the second link:
"Sin embargo, me llama poderosamente la atención cuánto se escandalizan los hispanohablantes ante la propuesta de la RAE de eliminar —o, al menos, de recomendar no poner— la tilde del adverbio «solo».
Y aunque la RAE, compuesta como está por seres humanos, tiene a veces facilidad para meter la pata, me parece, sin embargo, que en esta ocasión acierta con esta propuesta "
"Just" has a lot of meanings. As an adjective it means fair or right. As an adverb it seems to be a way of emphasizing a precision of some sort; and so it can mean: exactly, barely, very recently, really, absolutely, simply, but no more than, only, or etc. So in this Duo exercise sentence it means something like "only," as in "I am not going to ride in a car or on a bike; I am only going to walk." For a more comprehensive list of definitions (including when used with certain other words), see: www: learnersdictionary.com/define/just