Version: 2.0.3 (using KDE 4.1.3) Compiler: target: i386-redhat-linux OS: Linux Installed from: Fedora RPMs Kile is stuck in Math mode syntax highlighting after specifications of math-mode separator characters including curly brackets in tabular environments. Example: \begin{tabular}{r @{$\mathrel{=}$}} ... ! mathstart not recognized ! this mathend delimiter is not recognized. However, a second occurance of such construct does not lead back to normal display but Kile will highlight all remaining content until the end of the document as math. The problem seems to be the additional curly brackets within the @{} environment. The \mathrel or \mathop are definitely not the source. E.g. @{${}$} is enough to trigger the error.
Fixed in r915126 which is part of KDE 4.2.