Patches for some of these issues may be found here:

  http://www.borland.com/devsupport/jbuilder/

Answers in this category:
jbuilder -build throws a null pointer exception if there is an archive node in the project
My project references class files for which I have no source. JB3.5 would compile this, but JB4.0 won't. What's wrong?
TogetherJ Javadoc comments confuse JBuilder 4.0? I'm getting "unclosed comment at line <line #>"
"Delete IIOP generated files" deletes everything!
I can't define another application server.
Should the "Include debug info" switch affect the serialVersionUID?
Find in Path won't search for wildcard characters even if 'pattern match' is unchecked. The current file 'Find' command will do this.
I'm using a non-English keyboard and JBuilder's license dialog won't accept the ? character.
Team/CVS Project Create Module fails on Windows 2000
Compiler Error: "Error #: 2301 : internal compiler error: java.lang.NullPointerException"
Unreported Exception error message in an anonymous class
UNVERIFIED: Jbuilder accepts assignments to 'final' variables.
Foundation won't compile a project created/altered by a sample, tutorial, or wizard.
The JSP Tutorial doesn't work.
JBuilder4 doesn't work properly with J2ME SDK.
I can't find file setup_windows.html!
After running a wizard, keyboard context is stuck in a source file and won't move to the desired file.
Why does JB4f associate file-extensions like *.class, *.java, *.idletc. with itself even when I don't want to? (I clearly said 'No' when it JB asked.
My project pane isn't displaying complete package names, and won't let me browse packages I know exist in my source tree.
Enterprise's JSP Syntax highlighting is broken.
I try to launch JBuilder 4 but I get the following exception: Exception occurred during event dispatching:java.lang.StringIndexOutOfBoundsException: String index out of range: 55 at java.lang.String.charAt(String.java:507) at com.borland.primetime.util.Strings$StringEncoding.b(Unknown Source) ...
CVS doesn't function on Windows 95/98.
CVS Diff (in the source pane's history tab) handles unicode characters incorrectly.
JBuilder 4 Enterprise: Solaris: Error when starting EJBs in WebLogic, "java.lang.NoClassDefFoundError"
Designer can lose changes made directly in the source code.