Fixed.
 xxxxx@xxxxx  2003-11-15The first sentence of a package, class or member contains {@docRoot} 
appears in the alphabetic index as a kind of a summary.  If that index
is generated *without* -splitindex, that {@docRoot} link is broken.

For example, for a first sentence in a class comment that links
to the package summary page, if the original first sentence is:

<A HREF="{@docRoot}/p1/package-summary.html#tests">To package tests</A>

I expect to get this in the index-all.html file:

<A HREF="./p1/package-summary.html#tests">To package tests</A>

but instead get this:

<A HREF="/p1/package-summary.html#tests">To package tests</A>

N/A

Fix for Tiger.  I've already written the test for index-all.html in
the DocRootSlash.java test file, but have yet to write the fix.
 xxxxx@xxxxx  2002-10-08

The SingleIndexWriter.java source file uses a constructor that does
not set the relativepath field, while SplitIndexWriter.java does.
 xxxxx@xxxxx  2002-10-09

Fixed by initializing the relativepath field.
 xxxxx@xxxxx  2003-11-15

I've encountered this bug as well.  A workaround is to prefix the {@docRoot} with an extra "./"  In your example, this reduces to .//p1/package-summary.html#tests
The extra "/" is needed though so that links from other pages work correctly.  Additionally, for the index-add.html page and friends, the link works correctly although it's technically not correct.
Once the javadoc tool gets fixed to correctly insert a "." for these pages, this workaround will be superfluous, but still not get in the way.