I was running into the same problem. It was the Spelling Cow auto spell checker. I figured out that if I went into my Profile and turned off the auto spell check feature, I no longer got that error. See if that helps any.
Guys, turn off the stupid spelling thing -- seems like that's the cause -- and no worries about any spelling errors.
Relax and consider the following:
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Aoccdrnig to rscheearch at an Elingsh uinervtisy, it deosn't mttaer in waht oredr the ltteers in a wrod are, the olny iprmoetnt tihng is taht the frist and lsat ltteer are in the rghit pclae. The rset can be a toatl mses and you can sitll raed it wouthit a porbelm. Tihs is bcuseae we do not raed ervey lteter by it slef but the wrod as a wlohe and the biran fguiers it out aynawy.
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