xenon,
Sorry that you are seeing this issue.
Can you please check whether JSP validation settings are fine ? Go to Window > Preferences > MyEclipse > Validation and make sure that Manual and Build options are checked for “JSP content validator” and “JSP syntax validator”.
Can you please switch to a new workspace and check whether you can replicate the issue or not ?
If you are still facing issue, Can you please attach the sample JSP file which exhibits this issue to help us replicate the issue at our end ? Also, please attach the .log file located at <Workspace>/.metadata/.log file to help us investigate further ?