A bug with TeX \$ special sequence

Hello! I've been writing a lot in LaTeX last time and noticed that XEmacs interprets incorrectly the "\$" sequence. It treats it as if it was a math formula starting while it's just a shell-variable name's starting. Like here : The shell varaible {\tt \$blah} ...". XEmacs starts to highlight everything green. And it even doesn't end with next "\$" sequence, but sometimes earlier (on a newline for example). It refers to XEmacs v20.4 on a Linux 2.0.34 on an Pentium box. I got the precompiled version from a mirror site. Bartosz Maruszewski