in the last EAP builds i've noticed an issue with syntax coloring in conjunction with using of conditional compile statements. Given the following piec of code:
#if OPTION then
If OPTION is defined as OPTION=0 in the user defined constants part of the advanced compile options, the #else part is compiled. R# does syntax highlighting on the #if block instead of the #else block.
Currently i'm using build 1281. I'm not sure since which build this issue occurs, but i remember that the syntax highlighting works correct in former builds.