Below is a summary list of the SPRs fixed by 5.2.1.
You may consider upgrading to 5.2.1 for your Objy installation.


SPR07834 - oonewfd does not handle test.BOOT file name as a bootstrap file
SPR08395 - Allow the use of strings which can be NULL in indices.
SPR08449 - oocopyfd removes extension on a BOOT file name.
SPR10888 - Unwanted file left behind after oocopyfd causes confusion
SPR11651 - Apparent over-pinning problem in d_set insert
SPR11982 - ""ooDelete (keyH)"" causes Error #2606 when key value is NULL
string
SPR12176 - Index creation on string member in class causes SEGV if any
instances of string are null
SPR12236 - Copyright dates need to be changed to 1999/2000
SPR12253 - Trying to create a new db with an existing file name fails but
deletes the file
SPR15028 - Schema change causes reference to incorrect object type
SPR15083 - Trying to fetch() object that has array of objects causes fetch
errors
SPR15090 - Error 4306 running the ooPersonSet
SPR15182 - VP table used in AMS is not thread-safe
SPR15187 - Predicate query over association with target locked for update
crashes.
SPR15193 - ooCollectionsSample core dumps if run without creating a dummy
database
SPR15194 - ooVArrays lost when migrating an object to a new shape
SPR15232 - basic replication fails on R52
SPR15233 - repl takes too long to print error messages
SPR15235 - updater sees Error 4624 while oobackup runs and also versions
exist because of MROW sessions
SPR15236 - Some evolutions that change base class paths fail on Solaris7
SPR15237 - d_list causing error #68.
SPR15241 - oconfig.pl file is corrupted on Linux
SPR15242 - Memory leak
SPR15246 - ooinstallfd doesn't update boot path in FDB
SPR15254 - OFJ with JDK1.2 runs out of JNI local refs when registering
deeply nested class graph
SPR15255 - OFJ has memory leak when iterating (reading) many objects that
have special references
SPR15257 - Compilation errors on AIX 4.3
SPR15261 - Predicate scan failure after schema evolution
SPR15263 - Active Schema gets segv with SLAC schema
SPR15265 - OFJ incorrectly reuses array object
SPR15268 - Active Schema mishandles a deleted class
SPR15269 - NT lock server fails for more than 64 clients
SPR15270 - ooMap::add() can "segment fault" if container or disk is full
SPR15277 - ooCollections.h warning messages
SPR15281 - Predicate query not-equal broken in dev (regression)
SPR15289 - enclosingPersistentObject fix
SPR15292 - Smalltalk fix
SPR15293 - d_Relationship::inverse() fails for association to same class
SPR15294 - Macros defining return values for d_Relationship::propagate()
are wrong
SPR15295 - Enhancement - schema manager performance is slow
SPR15297 - Loop of session.begin() and session.commit() has memory leak