ssquire ,
Sorry that you are seeing this issue with MyEclipse.
Can you answer some more questions for me to understand the issue better ?
1) Can you share your Build ID from Help > About MyEclipse Enterprise Edition > Build ID?
2) Did you update your workbench lately ?
3) Can you recheck the web.xml for any missing <taglib> references ?
4) What is the exact error message you see on the <%@taglib %> tag ? Paste it here for me.
5) Can you switch to a new workspace and check if the issue persists ? If yes then please check the .log file located at <workspace dir>/.metadata/.log for any errors of interest. Please paste the errors here.