Incorrect Syntax Exception When Prefacing SP Names With Dbo. And Named Parameter Issues

We're currently trying to evaluate SQLJDBC 2005 1.1 June CTP's support for database mirroring automatic failover. Unfortunately we're getting unexpected exceptions for calls that work fine w/ jtds that our blocking our ability to perform these evaluations without us making substantial changes to our codebase.

The first issue is with the name used when calling a stored procedure -- SP names that start with "dbo." give us the following error:

com.microsoft.sqlserver.jdbc.SQLServerException: Incorrect syntax near '.'. src:{call dbo.xyz(?,?,?,?,?,?,?,?)}

The call will work if we change the SQL statement to {call xyz(...)}. I don't understand why we would need to do this, especially given that the documentation for the driver shows call statements with the "dbo." prefix.

We're also having problems using named parameters with stored procedures (for both in and out parametes). Our code has parameter names of the form "@param" as is standard with TSQL (and is required when using jtds). However, this won't work with SQLJDBC -- it only seems to accept parameter names w/o the leading "@". Why is this so?

Finally, we were able to cause a NullPointerException within the driver due to an incorrectly built Properties object that contained an Integer for loginTimeout instead of a String:
java.lang.NullPointerException
at java.util.Hashtable.put(Hashtable.java:396)
at java.util.Properties.setProperty(Properties.java:128)
at com.microsoft.sqlserver.jdbc.SQLServerDriver.fixupProperties(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerDriver.mergeURLAndSuppliedProperties(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(Unknown Source)
While this was due to a bug in our code I would think that such common errors would be better handled.