Running Aptana Studio 3, build: 3.1.1.201204131931 on Ubuntu 10.04 64-bit.
I just installed the latest update this morning and now notice that the syntax checking for PHP files is no longer working properly.
Here is a screenshot showing syntax errors and yet the script actually executes without issue. This didn't happen prior to the update.
Restarting the Aptana Studio application appears to have resolved the issue.